RustCrypto dependency updates; MSRV 1.47+ (#251)

Updates the following dependencies:
- `des` v0.7
- `elliptic-curve` v0.9
- `hmac` v0.11
- `pbkdf2` v0.8
- `p256` v0.8
- `p384` v0.7

Cargo.toml

@@ -25,18 +25,18 @@ maintenance = { status = "experimental" }
 chrono = "0.4"
 cookie-factory = "0.3"
 der-parser = "5"
-des = "0.6"
-elliptic-curve = "0.8"
+des = "0.7"
+elliptic-curve = "0.9"
 getrandom = "0.1"
-hmac = "0.10"
+hmac = "0.11"
 log = "0.4"
 nom = "6"
 num-bigint-dig = { version = "0.7", features = ["rand"], package = "num-bigint-dig" }
 num-traits = "0.2"
 num-integer = "0.1"
-pbkdf2 = { version = "0.7", default-features = false }
-p256 = "0.7"
-p384 = "0.6"
+pbkdf2 = { version = "0.8", default-features = false }
+p256 = "0.8"
+p384 = "0.7"
 pcsc = "2"
 rsa = "0.4"
 secrecy = "0.7"