Version bump. Update changelog

Author: devblackops

CHANGELOG.md

@@ -5,6 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [1.2.1] - 2019-01-17
+
+### Changed
+
+- Switch to Alpine 3.8 and PowerShell 6.1.2 for container
+- Install git on container so BuildHelpers doesn't throw error
+- Upgrade to BuildHelpers 2.0.7
+
 ## [1.2.0] - 2019-01-15
 
 ### Changed

Dockerfile

@@ -8,7 +8,7 @@ RUN Set-PSRepository -Name PSGallery -InstallationPolicy Trusted; \
 
 FROM base as psake-build
 LABEL "name"                            = "github-action-psake"
-LABEL "version"                         = "1.1.0"
+LABEL "version"                         = "1.2.1"
 LABEL "com.github.actions.name"         = "psake task"
 LABEL "com.github.actions.description"  = "Run psake tasks"
 LABEL "com.github.actions.icon"="settings"