Bump signature crate dependency to v2.0

Release notes: RustCrypto/traits#1211

Author: tarcieri

Cargo.lock

@@ -21,7 +21,7 @@ num-traits = { version = "0.2", default-features = false }
 pkcs8 = { version = "0.9", default-features = false, features = ["alloc"] }
 rfc6979 = { version = "0.3", path = "../rfc6979" }
 sha2 = { version = "0.10", default-features = false }
-signature = { version = "=2.0.0-rc.1", default-features = false, features = ["alloc", "digest-preview", "rand-preview"] }
+signature = { version = "2.0, <2.1", default-features = false, features = ["alloc", "digest", "rand_core"] }
 zeroize = { version = "1.5", default-features = false }
 
 [dev-dependencies]

dsa/Cargo.toml

@@ -17,7 +17,7 @@ rust-version = "1.57"
 
 [dependencies]
 elliptic-curve = { version = "0.12", default-features = false, features = ["digest", "sec1"] }
-signature = { version = "=2.0.0-rc.1", default-features = false, features = ["rand-preview"] }
+signature = { version = "2.0, <2.1", default-features = false, features = ["rand_core"] }
 
 # optional dependencies
 der = { version = "0.6", optional = true }
@@ -36,7 +36,7 @@ std = ["alloc", "elliptic-curve/std", "signature/std"]
 
 arithmetic = ["elliptic-curve/arithmetic"]
 dev = ["arithmetic", "digest", "elliptic-curve/dev", "hazmat"]
-digest = ["signature/digest-preview"]
+digest = ["signature/digest"]
 hazmat = []
 pkcs8 = ["elliptic-curve/pkcs8", "der"]
 pem = ["elliptic-curve/pem", "pkcs8"]

ecdsa/Cargo.toml

@@ -17,7 +17,7 @@ edition = "2021"
 rust-version = "1.56"
 
 [dependencies]
-signature = { version = "=2.0.0-rc.1", default-features = false }
+signature = { version = "2", default-features = false }
 
 # optional dependencies
 pkcs8 = { version = "0.9", optional = true }