Bump version to 0.20.2-0.6.1

This is an API addition but can be done in a patch version because we
are pre-1.0

The single patch adds derives to the crate error type.

Author: tcharding

CHANGELOG.md

@@ -1,3 +1,7 @@
+## v0.20.2-0.6.1
+
+- Add derives on error type [#72](https://github.com/rust-bitcoin/rust-bitcoinconsensus/pull/72)
+
 ## v0.20.2-0.6.0
 
 * Bump MSRV to rust 1.48.0 [#64](https://github.com/rust-bitcoin/rust-bitcoinconsensus/pull/64)

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "bitcoinconsensus"
 # The first part is the Bitcoin Core version, the second part is the version of this lib.
-version = "0.20.2-0.6.0"
+version = "0.20.2-0.6.1"
 authors = ["Tamas Blummer <tamas.blummer@gmail.com>"]
 license = "Apache-2.0"
 homepage = "https://github.com/rust-bitcoin/rust-bitcoinconsensus/"