Prepare for tagging a new version

CHANGELOG.md

@@ -5,6 +5,16 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.2.0] - 2021-10-13
+
+### Added
+
+- Can optionally display pH tank level alongside raw pH value now (on by default).
+
+### Fixed
+
+- Better font size scaling with newer MagicMirror versions.
+
 ## [1.1.2] - 2020-04-08
 
 ### Fixed