Update changelog (#41)

Author: oscargus

changelog.rst

@@ -70,6 +70,7 @@ Fixed
 
 Initial version
 
-- `unreleased <https://github.com/oscargus/mplsignal/compare/v0.1.1...HEAD>`_
+- `unreleased <https://github.com/oscargus/mplsignal/compare/v0.2.0...HEAD>`_
+- `0.2.0 <https://github.com/oscargus/mplsignal/compare/v0.1.1...v0.2.0>`_
 - `0.1.1 <https://github.com/oscargus/mplsignal/compare/v0.1.0...v0.1.1>`_
 - `0.1.0 <https://github.com/oscargus/mplsignal/releases/tag/v0.1.0>`_