Bump version to 0.7.0 (#115)

* Bump dependencies

* remove unnecessary extern crates and rustfmt

* Bump version to 0.7.0

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "curv"
-version = "0.6.2"
+version = "0.7.0"
 edition = "2018"
 authors = ["Omer Shlomovits"]
 license = "MIT"
@@ -14,12 +14,12 @@ crate-type = ["lib"]
 blake2b_simd = "0.5.7"
 cryptoxide = "0.1.2"
 curve25519-dalek = "1.2.3"
-derivative = "2.1.1"
+derivative = "2.2"
 digest = "0.8.1"
 ff-zeroize = "0.6.3"
 funty = "=1.1.0"
 generic-array = "0.14"
-hex = "^0.3"
+hex = "0.4"
 hmac = "0.7.1"
 merkle-sha3 = "^0.1"
 lazy_static = "1.4.0"
@@ -36,11 +36,11 @@ sha3 = "0.8.2"
 zeroize = "1"
 
 rust-gmp-kzen = { version = "0.5", features = ["serde_support"], optional = true }
-num-bigint = { version = "0.3", features = ["serde"], optional = true }
+num-bigint = { version = "0.4", features = ["serde"], optional = true }
 
 [dependencies.secp256k1]
-version = "0.15.3"
-features = ["serde"]
+version = "0.20"
+features = ["serde", "rand-std"]
 
 [dependencies.p256]
 version = "0.5"

src/cryptographic_primitives/hashing/hash_sha256.rs

@@ -50,12 +50,10 @@ impl Hash for HSha256 {
 mod tests {
     use super::HSha256;
     use super::Hash;
+    use crate::arithmetic::traits::*;
     use crate::elliptic::curves::traits::ECPoint;
     use crate::elliptic::curves::traits::ECScalar;
     use crate::BigInt;
-    extern crate hex;
-    extern crate sha2;
-    use crate::arithmetic::traits::*;
     use sha2::Digest;
     use sha2::Sha256;