chore: prep v0.13.0 (#168)

Co-authored-by: Brandon Trautmann <[email protected]>

Author: btrautmann

CHANGELOG.md

@@ -1,3 +1,21 @@
+# 0.13.0
+
+## What's Changed
+* ci: use mobile messaging app for Slack notifs by @btrautmann in https://github.com/Betterment/alchemist/pull/158
+* chore: use `git commit` instead of `git-auto-commit` action by @btrautmann in https://github.com/Betterment/alchemist/pull/163
+* fix: push changes in update goldens workflow by @btrautmann in https://github.com/Betterment/alchemist/pull/166
+* fix: Anti-aliasing cross-platform issue by @w3ggy in https://github.com/Betterment/alchemist/pull/165
+* chore: ensure tests are compatible with all supported Flutter versions (and beta) by @btrautmann in https://github.com/Betterment/alchemist/pull/167
+
+## :warning: Breaking Changes
+
+https://github.com/Betterment/alchemist/pull/165 disabled anti-aliasing on `BlockedTextPaintingContext` which may change goldens output.
+
+## New Contributors
+* @w3ggy made their first contribution in https://github.com/Betterment/alchemist/pull/165
+
+**Full Changelog**: https://github.com/Betterment/alchemist/compare/v0.12.1...v0.13.0
+
 # 0.12.1
 
 ## What's Changed

pubspec.yaml

@@ -1,7 +1,7 @@
 name: alchemist
 description: A support package that aims to make golden testing in Flutter
   easier and more streamlined.
-version: 0.12.1
+version: 0.13.0
 homepage: https://github.com/Betterment/alchemist
 repository: https://github.com/Betterment/alchemist