Bump p256 from 0.1.0 to 0.2.0

Bumps [p256](https://github.com/RustCrypto/elliptic-curves) from 0.1.0 to 0.2.0.
- [Release notes](https://github.com/RustCrypto/elliptic-curves/releases)
- [Commits](https://github.com/RustCrypto/elliptic-curves/compare/p256/v0.1.0...p256/v0.2.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Cargo.lock

@@ -484,9 +484,9 @@ checksum = "2839e79665f131bdb5782e51f2c6c9599c133c6098982a54c794358bf432529c"
 
 [[package]]
 name = "p256"
-version = "0.1.0"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "812a058a5afc96a52a8ab6e250325d025254ff030ff737dc5b62576e4e604c42"
+checksum = "86640e33ca638ec215c74de317696bbca5daa7d52cf55b905bd20a6bd2cfd133"
 dependencies = [
  "elliptic-curve",
  "subtle 2.2.2",