Bump bitcoin_hashes to version 0.10

Requires for interoperability of the `ThirtyTwoByteHash` trait with
rust-bitcoin.

Author: thomaseizinger

Cargo.toml

@@ -30,7 +30,7 @@ global-context-less-secure = []
 
 [dependencies]
 secp256k1-sys = { version = "0.4.1", default-features = false, path = "./secp256k1-sys" }
-bitcoin_hashes = { version = "0.9", optional = true }
+bitcoin_hashes = { version = "0.10", optional = true }
 rand = { version = "0.6", default-features = false, optional = true }
 serde = { version = "1.0", default-features = false, optional = true }