Minor fixes to Cargo.toml

Cargo.toml

@@ -3,13 +3,14 @@ authors = ["Vitaly Domnikov <oss@vitaly.codes>"]
 categories = ["embedded", "hardware-support", "no-std"]
 description = "Peripheral access API for STM32C0 series microcontrollers"
 documentation = "https://docs.rs/stm32c0xx-hal"
-edition = "2018"
+edition = "2021"
 keywords = ["arm", "cortex-m", "stm32c0xx", "hal"]
 license = "MIT/Apache-2.0"
 name = "stm32c0xx-hal"
 readme = "README.md"
 repository = "https://github.com/stm32-rs/stm32c0xx-hal"
 version = "0.0.0"
+rust-version = "1.65"
 
 [package.metadata.docs.rs]
 features = ["stm32c031", "rt"]
@@ -29,15 +30,15 @@ version = "1.0.0"
 
 [dependencies.embedded-hal]
 features = ["unproven"]
-version = "0.2.6"
+version = "0.2.7"
 
 [dependencies.void]
 default-features = false
 version = "1.0.2"
 
 [dev-dependencies]
 cortex-m-rt = "0.7.1"
-cortex-m-rtic = "1.0.0"
+cortex-m-rtic = "1.1.3"
 cortex-m-semihosting = "0.3.7"
 panic-halt = "0.2.0"
 panic-semihosting = "0.5.6"
@@ -53,10 +54,15 @@ i2c-blocking = []
 i2c-nonblocking = []
 
 [profile.dev]
+codegen-units = 1
+debug = true
 incremental = false
+lto = false
+opt-level = 2
 
 [profile.release]
 debug = false
 codegen-units = 1
 incremental = false
-lto = false
+lto = true
+opt-level = "z"