Update sha2 requirement from 0.8.1 to 0.9.2

Updates the requirements on [sha2](https://github.com/RustCrypto/hashes) to permit the latest version.
- [Release notes](https://github.com/RustCrypto/hashes/releases)
- [Commits](RustCrypto/hashes@whirlpool-v0.8.1...streebog-v0.9.2)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

Cargo.toml

@@ -31,7 +31,7 @@ rand = "0.7.3"
 random-access-disk = "2.0.0"
 random-access-memory = "2.0.0"
 random-access-storage = "4.0.0"
-sha2 = "0.8.1"
+sha2 = "0.9.2"
 sleep-parser = "0.8.0"
 sparse-bitfield = "0.11.0"
 tree-index = "0.6.0"