Bump version to 0.27.0

Add changelog notes and bump the minor version number.

Author: tcharding

CHANGELOG.md

@@ -1,3 +1,9 @@
+# 0.27.0 - 2023-13-15
+
+* [Depend on newly release `bitcoin_hashes` v0.12](https://github.com/rust-bitcoin/rust-secp256k1/pull/588).
+* [Implement `Debug` trait for `Scalar` type](https://github.com/rust-bitcoin/rust-secp256k1/pull/578).
+* [Implement `insecure-erase`](https://github.com/rust-bitcoin/rust-secp256k1/pull/582).
+
 # 0.26.0 - 2202-12-19
 
 * Update libsecp25k1 to v0.2.0

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "secp256k1"
-version = "0.26.0"
+version = "0.27.0"
 authors = [ "Dawid Ciężarkiewicz <dpc@ucore.info>",
             "Andrew Poelstra <apoelstra@wpsoftware.net>" ]
 license = "CC0-1.0"