diff --git a/Cargo.lock b/Cargo.lock
index 6b893787d..f156bb219 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -70,9 +70,9 @@ checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
 
 [[package]]
 name = "backtrace"
-version = "0.3.55"
+version = "0.3.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef5140344c85b01f9bbb4d4b7288a8aa4b3287ccef913a14bcc78a1063623598"
+checksum = "9d117600f438b1707d4e4ae15d3595657288f8235a0eb593e80ecc98ab34e1bc"
 dependencies = [
  "addr2line",
  "cfg-if 1.0.0",
@@ -135,9 +135,9 @@ dependencies = [
 
 [[package]]
 name = "bumpalo"
-version = "3.4.0"
+version = "3.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2e8c087f005730276d1096a652e92a8bacee2e2472bcc9715a74d2bec38b5820"
+checksum = "099e596ef14349721d9016f6b80dd3419ea1bf289ab9b44df8e4dfd3a005d5d9"
 
 [[package]]
 name = "byte-tools"
@@ -350,9 +350,9 @@ dependencies = [
 
 [[package]]
 name = "curl-sys"
-version = "0.4.39+curl-7.74.0"
+version = "0.4.40+curl-7.75.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "07a8ce861e7b68a0b394e814d7ee9f1b2750ff8bd10372c6ad3bacc10e86f874"
+checksum = "2ffafc1c35958318bd7fdd0582995ce4c72f4f461a8e70499ccee83a619fd562"
 dependencies = [
  "cc",
  "libc",
@@ -400,9 +400,9 @@ dependencies = [
 
 [[package]]
 name = "derivative"
-version = "2.1.3"
+version = "2.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eaed5874effa6cde088c644ddcdcb4ffd1511391c5be4fdd7a5ccd02c7e4a183"
+checksum = "fcc3dd5e9e9c0b295d6e1e4d811fb6f157d5ffd784b8d202fc62eac8035a770b"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -435,9 +435,9 @@ checksum = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
 
 [[package]]
 name = "encoding_rs"
-version = "0.8.26"
+version = "0.8.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "801bbab217d7f79c0062f4f7205b5d4427c6d1a7bd7aafdd1475f7c59d62b283"
+checksum = "80df024fbc5ac80f87dfef0d9f5209a252f2a497f7f42944cff24d8253cac065"
 dependencies = [
  "cfg-if 1.0.0",
 ]
@@ -460,21 +460,21 @@ checksum = "e88a8acf291dafb59c2d96e8f59828f3838bb1a70398823ade51a84de6a6deed"
 
 [[package]]
 name = "filetime"
-version = "0.2.13"
+version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0c122a393ea57648015bf06fbd3d372378992e86b9ff5a7a497b076a28c79efe"
+checksum = "1d34cfa13a63ae058bfa601fe9e313bbdb3746427c1459185464ce0fcf62e1e8"
 dependencies = [
  "cfg-if 1.0.0",
  "libc",
- "redox_syscall 0.1.57",
+ "redox_syscall 0.2.5",
  "winapi 0.3.9",
 ]
 
 [[package]]
 name = "flate2"
-version = "1.0.19"
+version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7411863d55df97a419aa64cb4d2f167103ea9d767e2c54a1868b7ac3f6b47129"
+checksum = "cd3aec53de10fe96d7d8c565eb17f2c687bb5518a2ec453b5b1252964526abe0"
 dependencies = [
  "cfg-if 1.0.0",
  "crc32fast",
@@ -548,18 +548,18 @@ checksum = "4c7e4c2612746b0df8fed4ce0c69156021b704c9aefa360311c04e6e9e002eed"
 
 [[package]]
 name = "futures-channel"
-version = "0.3.9"
+version = "0.3.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f01c61843314e95f96cc9245702248733a3a3d744e43e2e755e3c7af8348a0a9"
+checksum = "f2d31b7ec7efab6eefc7c57233bb10b847986139d88cc2f5a02a1ae6871a1846"
 dependencies = [
  "futures-core",
 ]
 
 [[package]]
 name = "futures-core"
-version = "0.3.9"
+version = "0.3.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db8d3b0917ff63a2a96173133c02818fac4a746b0a57569d3baca9ec0e945e08"
+checksum = "79e5145dde8da7d1b3892dad07a9c98fc04bc39892b1ecc9692cf53e2b780a65"
 
 [[package]]
 name = "futures-cpupool"
@@ -573,30 +573,30 @@ dependencies = [
 
 [[package]]
 name = "futures-io"
-version = "0.3.9"
+version = "0.3.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e37c1a51b037b80922864b8eed90692c5cd8abd4c71ce49b77146caa47f3253b"
+checksum = "28be053525281ad8259d47e4de5de657b25e7bac113458555bb4b70bc6870500"
 
 [[package]]
 name = "futures-sink"
-version = "0.3.9"
+version = "0.3.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f6adabac1290109cfa089f79192fb6244ad2c3f1cc2281f3e1dd987592b71feb"
+checksum = "caf5c69029bda2e743fddd0582d1083951d65cc9539aebf8812f36c3491342d6"
 
 [[package]]
 name = "futures-task"
-version = "0.3.9"
+version = "0.3.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a92a0843a2ff66823a8f7c77bffe9a09be2b64e533562c412d63075643ec0038"
+checksum = "13de07eb8ea81ae445aca7b69f5f7bf15d7bf4912d8ca37d6645c77ae8a58d86"
 dependencies = [
  "once_cell",
 ]
 
 [[package]]
 name = "futures-util"
-version = "0.3.9"
+version = "0.3.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "036a2107cdeb57f6d7322f1b6c363dad67cd63ca3b7d1b925bdf75bd5d96cda9"
+checksum = "632a8cd0f2a4b3fdea1657f08bde063848c3bd00f9bbf6e256b8be78802e624b"
 dependencies = [
  "futures-core",
  "futures-io",
@@ -628,9 +628,9 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4060f4657be78b8e766215b02b18a2e862d83745545de804638e2b545e81aee6"
+checksum = "c9495705279e7140bf035dde1f6e750c162df8b625267cd52cc44e0b156732c8"
 dependencies = [
  "cfg-if 1.0.0",
  "libc",
@@ -675,7 +675,7 @@ dependencies = [
  "http 0.2.3",
  "indexmap",
  "slab",
- "tokio 1.0.1",
+ "tokio 1.2.0",
  "tokio-util",
  "tracing",
  "tracing-futures",
@@ -724,9 +724,9 @@ dependencies = [
 
 [[package]]
 name = "hermit-abi"
-version = "0.1.17"
+version = "0.1.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5aca5565f760fb5b220e499d72710ed156fdb74e631659e99377d9ebfbd13ae8"
+checksum = "322f4de77956e22ed0e5032c359a0f1273f1f7f0d79bfa3b8ffbc730d7fbcc5c"
 dependencies = [
  "libc",
 ]
@@ -777,9 +777,9 @@ dependencies = [
 
 [[package]]
 name = "httparse"
-version = "1.3.4"
+version = "1.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd179ae861f0c2e53da70d892f5f3029f9594be0c41dc5269cd371691b1dc2f9"
+checksum = "615caabe2c3160b313d52ccc905335f4ed5f10881dd63dc5699d47e90be85691"
 
 [[package]]
 name = "httpdate"
@@ -789,9 +789,9 @@ checksum = "494b4d60369511e7dea41cf646832512a94e542f68bb9c49e54518e0f468eb47"
 
 [[package]]
 name = "hyper"
-version = "0.12.35"
+version = "0.12.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9dbe6ed1438e1f8ad955a4701e9a944938e9519f6888d12d8558b645e247d5f6"
+checksum = "5c843caf6296fc1f93444735205af9ed4e109a539005abb2564ae1d6fad34c52"
 dependencies = [
  "bytes 0.4.12",
  "futures",
@@ -819,9 +819,9 @@ dependencies = [
 
 [[package]]
 name = "hyper"
-version = "0.14.2"
+version = "0.14.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12219dc884514cb4a6a03737f4413c0e01c23a1b059b0156004b23f1e19dccbe"
+checksum = "e8e946c2b1349055e0b72ae281b238baf1a3ea7307c7e9f9d64673bdd9c26ac7"
 dependencies = [
  "bytes 1.0.1",
  "futures-channel",
@@ -833,9 +833,9 @@ dependencies = [
  "httparse",
  "httpdate",
  "itoa",
- "pin-project 1.0.4",
+ "pin-project",
  "socket2",
- "tokio 1.0.1",
+ "tokio 1.2.0",
  "tower-service",
  "tracing",
  "want 0.3.0",
@@ -848,9 +848,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d6183ddfa99b85da61a140bea0efc93fdf56ceaa041b37d553518030827f9905"
 dependencies = [
  "bytes 1.0.1",
- "hyper 0.14.2",
+ "hyper 0.14.4",
  "native-tls",
- "tokio 1.0.1",
+ "tokio 1.2.0",
  "tokio-native-tls",
 ]
 
@@ -862,9 +862,9 @@ checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
 
 [[package]]
 name = "idna"
-version = "0.2.0"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "02e2673c30ee86b5b96a9cb52ad15718aa1f966f5ab9ad54a8b95d5ca33120a9"
+checksum = "89829a5d69c23d348314a7ac337fe39173b61149a9864deabd260983aed48c21"
 dependencies = [
  "matches",
  "unicode-bidi",
@@ -924,9 +924,9 @@ checksum = "8eaf4bc02d17cbdd7ff4c7438cafcdf7fb9a4613313ad11b4f8fefe7d3fa0130"
 
 [[package]]
 name = "js-sys"
-version = "0.3.46"
+version = "0.3.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf3d7383929f7c9c7c2d0fa596f325832df98c3704f2c60553080f7127a58175"
+checksum = "5cfb73131c35423a367daf8cbd24100af0d077668c8c2943f0e7dd775fef0f65"
 dependencies = [
  "wasm-bindgen",
 ]
@@ -949,9 +949,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.82"
+version = "0.2.86"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89203f3fba0a3795506acaad8ebce3c80c0af93f994d5a1d7a0b1eeb23271929"
+checksum = "b7282d924be3275cec7f6756ff4121987bc6481325397dde6ba3e7802b1a8b1c"
 
 [[package]]
 name = "libz-sys"
@@ -976,11 +976,11 @@ dependencies = [
 
 [[package]]
 name = "log"
-version = "0.4.13"
+version = "0.4.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fcf3805d4480bb5b86070dcfeb9e2cb2ebc148adb753c5cca5f884d1d65a42b2"
+checksum = "51b9bbe6c47d51fc3e1a9b945965946b4c44142ab8792c50835a980d362c2710"
 dependencies = [
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
 ]
 
 [[package]]
@@ -1058,9 +1058,9 @@ dependencies = [
 
 [[package]]
 name = "mio"
-version = "0.7.7"
+version = "0.7.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e50ae3f04d169fcc9bde0b547d1c205219b7157e07ded9c5aff03e0637cb3ed7"
+checksum = "dc250d6848c90d719ea2ce34546fb5df7af1d3fd189d10bf7bad80bfcebecd95"
 dependencies = [
  "libc",
  "log",
@@ -1219,9 +1219,9 @@ dependencies = [
 
 [[package]]
 name = "object"
-version = "0.22.0"
+version = "0.23.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d3b63360ec3cb337817c2dbd47ab4a0f170d285d8e5a2064600f3def1402397"
+checksum = "a9a7ab5d64814df0fe4a4b5ead45ed6c5f181ee3ff04ba344313a6c80446c5d4"
 
 [[package]]
 name = "once_cell"
@@ -1327,38 +1327,18 @@ checksum = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"
 
 [[package]]
 name = "pin-project"
-version = "0.4.27"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2ffbc8e94b38ea3d2d8ba92aea2983b503cd75d0888d75b86bb37970b5698e15"
-dependencies = [
- "pin-project-internal 0.4.27",
-]
-
-[[package]]
-name = "pin-project"
-version = "1.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95b70b68509f17aa2857863b6fa00bf21fc93674c7a8893de2f469f6aa7ca2f2"
-dependencies = [
- "pin-project-internal 1.0.4",
-]
-
-[[package]]
-name = "pin-project-internal"
-version = "0.4.27"
+version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "65ad2ae56b6abe3a1ee25f15ee605bacadb9a764edaba9c2bf4103800d4a1895"
+checksum = "96fa8ebb90271c4477f144354485b8068bd8f6b78b428b01ba892ca26caf0b63"
 dependencies = [
- "proc-macro2",
- "quote",
- "syn",
+ "pin-project-internal",
 ]
 
 [[package]]
 name = "pin-project-internal"
-version = "1.0.4"
+version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "caa25a6393f22ce819b0f50e0be89287292fda8d425be38ee0ca14c4931d9e71"
+checksum = "758669ae3558c6f74bd2a18b41f7ac0b5a195aea6639d6a9b5e5d1ad5ba24c0b"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1439,18 +1419,18 @@ dependencies = [
 
 [[package]]
 name = "quote"
-version = "1.0.8"
+version = "1.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "991431c3519a3f36861882da93630ce66b52918dcf1b8e2fd66b397fc96f28df"
+checksum = "c3d0b9745dc2debf507c8422de05d7226cc1f0644216dfdfead988f9b1ab32a7"
 dependencies = [
  "proc-macro2",
 ]
 
 [[package]]
 name = "rand"
-version = "0.8.1"
+version = "0.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c24fcd450d3fa2b592732565aa4f17a27a61c65ece4726353e000939b0edee34"
+checksum = "0ef9e7e66b4468674bfcb0c81af8b7fa0bb154fa9f28eb840da5c447baeb8d7e"
 dependencies = [
  "libc",
  "rand_chacha",
@@ -1470,9 +1450,9 @@ dependencies = [
 
 [[package]]
 name = "rand_core"
-version = "0.6.1"
+version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c026d7df8b298d90ccbbc5190bd04d85e159eaf5576caeacf8741da93ccbd2e5"
+checksum = "34cf66eb183df1c5876e2dcf6b13d57340741e8dc255b48e40a26de954d06ae7"
 dependencies = [
  "getrandom",
 ]
@@ -1494,9 +1474,9 @@ checksum = "41cc0f7e4d5d4544e8861606a285bb08d3e70712ccc7d2b84d7c0ccfaf4b05ce"
 
 [[package]]
 name = "redox_syscall"
-version = "0.2.4"
+version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05ec8ca9416c5ea37062b502703cd7fcb207736bc294f6e0cf367ac6fc234570"
+checksum = "94341e4e44e24f6b591b59e47a8a027df12e008d73fd5672dbea9cc22f4507d9"
 dependencies = [
  "bitflags",
 ]
@@ -1541,7 +1521,7 @@ dependencies = [
  "futures-util",
  "http 0.2.3",
  "http-body 0.4.0",
- "hyper 0.14.2",
+ "hyper 0.14.4",
  "hyper-tls",
  "ipnet",
  "js-sys",
@@ -1553,7 +1533,7 @@ dependencies = [
  "pin-project-lite",
  "serde",
  "serde_urlencoded",
- "tokio 1.0.1",
+ "tokio 1.2.0",
  "tokio-native-tls",
  "url",
  "wasm-bindgen",
@@ -1648,18 +1628,18 @@ checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
 [[package]]
 name = "serde"
-version = "1.0.119"
+version = "1.0.123"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9bdd36f49e35b61d49efd8aa7fc068fd295961fd2286d0b2ee9a4c7a14e99cc3"
+checksum = "92d5161132722baa40d802cc70b15262b98258453e85e5d1d365c757c73869ae"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.119"
+version = "1.0.123"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "552954ce79a059ddd5fd68c271592374bd15cab2274970380c000118aeffe1cd"
+checksum = "9391c295d64fc0abb2c556bad848f33cb8296276b1ad2677d1ae1ace4f258f31"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1668,9 +1648,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.61"
+version = "1.0.62"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4fceb2595057b6891a4ee808f70054bd2d12f0e97f1cbb78689b59f676df325a"
+checksum = "ea1c6153794552ea7cf7cf63b1231a25de00ec90db326ba6264440fa08e31486"
 dependencies = [
  "itoa",
  "ryu",
@@ -1703,9 +1683,9 @@ dependencies = [
 
 [[package]]
 name = "sha2"
-version = "0.9.2"
+version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e7aab86fe2149bad8c507606bdb3f4ef5e7b2380eb92350f56122cca72a42a8"
+checksum = "fa827a14b29ab7f44778d14a88d3cb76e949c45083f7dbfa507d0cb699dc12de"
 dependencies = [
  "block-buffer 0.9.0",
  "cfg-if 1.0.0",
@@ -1787,9 +1767,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.58"
+version = "1.0.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cc60a3d73ea6594cd712d830cc1f0390fd71542d8c8cd24e70cc54cdfd5e05d5"
+checksum = "c700597eca8a5a762beb35753ef6b94df201c81cca676604f547495a0d7f0081"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1812,7 +1792,7 @@ dependencies = [
  "fs2",
  "futures",
  "headers",
- "hyper 0.12.35",
+ "hyper 0.12.36",
  "lazy_static",
  "libc",
  "md-5",
@@ -1994,7 +1974,7 @@ dependencies = [
  "cfg-if 1.0.0",
  "libc",
  "rand",
- "redox_syscall 0.2.4",
+ "redox_syscall 0.2.5",
  "remove_dir_all",
  "winapi 0.3.9",
 ]
@@ -2039,11 +2019,11 @@ dependencies = [
 
 [[package]]
 name = "thread_local"
-version = "1.1.0"
+version = "1.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb9bc092d0d51e76b2b19d9d85534ffc9ec2db959a2523cdae0697e2972cd447"
+checksum = "8018d24e04c95ac8790716a5987d0fec4f8b27249ffa0f7d33f1369bdfb88cbd"
 dependencies = [
- "lazy_static",
+ "once_cell",
 ]
 
 [[package]]
@@ -2058,9 +2038,9 @@ dependencies = [
 
 [[package]]
 name = "tinyvec"
-version = "1.1.0"
+version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ccf8dbc19eb42fba10e8feaaec282fb50e2c14b2726d6301dbfeed0f73306a6f"
+checksum = "317cca572a0e89c3ce0ca1f1bdc9369547fe318a683418e42ac8f59d14701023"
 dependencies = [
  "tinyvec_macros",
 ]
@@ -2097,15 +2077,15 @@ dependencies = [
 
 [[package]]
 name = "tokio"
-version = "1.0.1"
+version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d258221f566b6c803c7b4714abadc080172b272090cdc5e244a6d4dd13c3a6bd"
+checksum = "e8190d04c665ea9e6b6a0dc45523ade572c088d2e6566244c1122671dbf4ae3a"
 dependencies = [
  "autocfg",
  "bytes 1.0.1",
  "libc",
  "memchr",
- "mio 0.7.7",
+ "mio 0.7.8",
  "num_cpus",
  "pin-project-lite",
 ]
@@ -2181,7 +2161,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f7d995660bd2b7f8c1568414c1126076c13fbb725c40112dc0120b78eb9b717b"
 dependencies = [
  "native-tls",
- "tokio 1.0.1",
+ "tokio 1.2.0",
 ]
 
 [[package]]
@@ -2203,17 +2183,6 @@ dependencies = [
  "tokio-sync",
 ]
 
-[[package]]
-name = "tokio-stream"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "76066865172052eb8796c686f0b441a93df8b08d40a950b062ffb9a426f00edd"
-dependencies = [
- "futures-core",
- "pin-project-lite",
- "tokio 1.0.1",
-]
-
 [[package]]
 name = "tokio-sync"
 version = "0.1.8"
@@ -2302,17 +2271,16 @@ dependencies = [
 
 [[package]]
 name = "tokio-util"
-version = "0.6.1"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12ae4751faa60b9f96dd8344d74592e5a17c0c9a220413dbc6942d14139bbfcc"
+checksum = "ebb7cb2f00c5ae8df755b252306272cd1790d39728363936e01827e11f0b017b"
 dependencies = [
  "bytes 1.0.1",
  "futures-core",
  "futures-sink",
  "log",
  "pin-project-lite",
- "tokio 1.0.1",
- "tokio-stream",
+ "tokio 1.2.0",
 ]
 
 [[package]]
@@ -2326,15 +2294,15 @@ dependencies = [
 
 [[package]]
 name = "tower-service"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e987b6bf443f4b5b3b6f38704195592cca41c5bb7aedd3c3693c7081f8289860"
+checksum = "360dfd1d6d30e05fda32ace2c8c70e9c0a9da713275777f5a4dbb8a1893930c6"
 
 [[package]]
 name = "tracing"
-version = "0.1.22"
+version = "0.1.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f47026cdc4080c07e49b37087de021820269d996f581aac150ef9e5583eefe3"
+checksum = "f77d3842f76ca899ff2dbcf231c5c65813dea431301d6eb686279c15c4464f12"
 dependencies = [
  "cfg-if 1.0.0",
  "pin-project-lite",
@@ -2352,11 +2320,11 @@ dependencies = [
 
 [[package]]
 name = "tracing-futures"
-version = "0.2.4"
+version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab7bb6f14721aa00656086e9335d363c5c8747bae02ebe32ea2c7dece5689b4c"
+checksum = "97d095ae15e245a057c8e8451bab9b3ee1e1f68e9ba2b4fbc18d0ac5237835f2"
 dependencies = [
- "pin-project 0.4.27",
+ "pin-project",
  "tracing",
 ]
 
@@ -2383,9 +2351,9 @@ dependencies = [
 
 [[package]]
 name = "unicode-normalization"
-version = "0.1.16"
+version = "0.1.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a13e63ab62dbe32aeee58d1c5408d35c36c392bba5d9d3142287219721afe606"
+checksum = "07fbfce1c8a97d547e8b5334978438d9d6ec8c20e38f56d4a4374d181493eaef"
 dependencies = [
  "tinyvec",
 ]
@@ -2478,15 +2446,15 @@ dependencies = [
 
 [[package]]
 name = "wasi"
-version = "0.10.1+wasi-snapshot-preview1"
+version = "0.10.2+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93c6c3420963c5c64bca373b25e77acb562081b9bb4dd5bb864187742186cea9"
+checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.69"
+version = "0.2.70"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3cd364751395ca0f68cafb17666eee36b63077fb5ecd972bbcd74c90c4bf736e"
+checksum = "55c0f7123de74f0dab9b7d00fd614e7b19349cd1e2f5252bbe9b1754b59433be"
 dependencies = [
  "cfg-if 1.0.0",
  "serde",
@@ -2496,9 +2464,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.69"
+version = "0.2.70"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1114f89ab1f4106e5b55e688b828c0ab0ea593a1ea7c094b141b14cbaaec2d62"
+checksum = "7bc45447f0d4573f3d65720f636bbcc3dd6ce920ed704670118650bcd47764c7"
 dependencies = [
  "bumpalo",
  "lazy_static",
@@ -2511,9 +2479,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-futures"
-version = "0.4.19"
+version = "0.4.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fe9756085a84584ee9457a002b7cdfe0bfff169f45d2591d8be1345a6780e35"
+checksum = "3de431a2910c86679c34283a33f66f4e4abd7e0aec27b6669060148872aadf94"
 dependencies = [
  "cfg-if 1.0.0",
  "js-sys",
@@ -2523,9 +2491,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.69"
+version = "0.2.70"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a6ac8995ead1f084a8dea1e65f194d0973800c7f571f6edd70adf06ecf77084"
+checksum = "3b8853882eef39593ad4174dd26fc9865a64e84026d223f63bb2c42affcbba2c"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -2533,9 +2501,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.69"
+version = "0.2.70"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5a48c72f299d80557c7c62e37e7225369ecc0c963964059509fbafe917c7549"
+checksum = "4133b5e7f2a531fa413b3a1695e925038a05a71cf67e87dafa295cb645a01385"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2546,15 +2514,15 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.69"
+version = "0.2.70"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e7811dd7f9398f14cc76efd356f98f03aa30419dea46aa810d71e819fc97158"
+checksum = "dd4945e4943ae02d15c13962b38a5b1e81eadd4b71214eee75af64a4d6a4fd64"
 
 [[package]]
 name = "web-sys"
-version = "0.3.46"
+version = "0.3.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "222b1ef9334f92a21d3fb53dc3fd80f30836959a90f9274a626d7e06315ba3c3"
+checksum = "c40dc691fc48003eba817c38da7113c15698142da971298003cac3ef175680b3"
 dependencies = [
  "js-sys",
  "wasm-bindgen",
diff --git a/crates/xdv/src/lib.rs b/crates/xdv/src/lib.rs
index 3bef176a9..2b6419839 100644
--- a/crates/xdv/src/lib.rs
+++ b/crates/xdv/src/lib.rs
@@ -221,10 +221,9 @@ impl<T: XdvEvents> XdvParser<T> {
     {
         const BUF_SIZE: usize = 4096;
         let mut parser = Self::new(events);
-        let mut buf = Vec::with_capacity(BUF_SIZE);
-        unsafe {
-            buf.set_len(BUF_SIZE);
-        }
+        // Note that it is unsound to pass uninitialized data to a read() call,
+        // even though it *should* never cause problems ...
+        let mut buf = vec![0; BUF_SIZE];
         let mut n_saved_bytes = 0;
 
         loop {
diff --git a/src/document.rs b/src/document.rs
index e10c90985..3507334d2 100644
--- a/src/document.rs
+++ b/src/document.rs
@@ -120,13 +120,11 @@ impl Document {
             let mut name = "document".to_owned();
             let mut tried_src_path = false;
 
-            if let Some(c) = src_dir.components().next_back() {
-                if let Component::Normal(t) = c {
-                    tried_src_path = true;
+            if let Some(Component::Normal(t)) = src_dir.components().next_back() {
+                tried_src_path = true;
 
-                    if let Some(s) = t.to_str() {
-                        name = s.to_owned();
-                    }
+                if let Some(s) = t.to_str() {
+                    name = s.to_owned();
                 }
             }
 
@@ -134,11 +132,9 @@ impl Document {
                 if let Ok(cwd) = env::current_dir() {
                     let full_path = cwd.join(&src_dir);
 
-                    if let Some(c) = full_path.components().next_back() {
-                        if let Component::Normal(t) = c {
-                            if let Some(s) = t.to_str() {
-                                name = s.to_owned();
-                            }
+                    if let Some(Component::Normal(t)) = full_path.components().next_back() {
+                        if let Some(s) = t.to_str() {
+                            name = s.to_owned();
                         }
                     }
                 }
diff --git a/src/io/memory.rs b/src/io/memory.rs
index a82d3ac16..946781912 100644
--- a/src/io/memory.rs
+++ b/src/io/memory.rs
@@ -49,15 +49,15 @@ struct MemoryIoItem {
 /// Get the current time as a Unix time, in a manner consistent with our Unix
 /// file modification time API. We choose to make this function infallible
 /// rather than injecting a bunch of Results.
-fn now_as_unix_time() -> Option<i64> {
+fn now_as_unix_time() -> i64 {
     // No cleaner way to convert a SystemTime to time_t, as far as I can
     // tell.
     let now = SystemTime::now();
     let dur = match now.duration_since(SystemTime::UNIX_EPOCH) {
         Ok(d) => d,
-        Err(_) => return Some(0), // indicates error to C code, if it cres
+        Err(_) => return 0, // indicates error to C code, if it cares
     };
-    Some(dur.as_secs() as i64)
+    dur.as_secs() as i64
 }
 
 impl MemoryIoItem {
@@ -69,12 +69,12 @@ impl MemoryIoItem {
         let (cur_data, cur_mtime) = match files.borrow_mut().remove(name) {
             Some(info) => {
                 if truncate {
-                    (Vec::new(), now_as_unix_time())
+                    (Vec::new(), Some(now_as_unix_time()))
                 } else {
                     (info.data, info.unix_mtime)
                 }
             }
-            None => (Vec::new(), now_as_unix_time()),
+            None => (Vec::new(), Some(now_as_unix_time())),
         };
 
         MemoryIoItem {
@@ -127,7 +127,7 @@ impl InputFeatures for MemoryIoItem {
 impl Drop for MemoryIoItem {
     fn drop(&mut self) {
         let unix_mtime = if self.was_modified {
-            now_as_unix_time()
+            Some(now_as_unix_time())
         } else {
             self.unix_mtime
         };
@@ -165,7 +165,7 @@ impl MemoryIo {
             name.to_owned(),
             MemoryFileInfo {
                 data,
-                unix_mtime: now_as_unix_time(),
+                unix_mtime: Some(now_as_unix_time()),
             },
         );
     }