v2.2.0

Changelog: https://gerrit.avm99963.com/plugins/gitiles/infinitegforums/+log/refs/tags/v2.1.2..refs/tags/v2.2.0

1. 2485a3e Use material tooltips by avm99963 · 2 years, 7 months ago
2. 413cb44 Add kill switch mechanism by Adrià Vilanova Martínez · 2 years, 8 months ago
3. 27c6996 Cache thread avatars by Adrià Vilanova Martínez · 2 years, 9 months ago
4. 85424b6 Remove CleanWebpackPlugin in favor of output.clean by Adrià Vilanova Martínez · 2 years, 9 months ago
5. 3465e77 Refactor extension to webpack by Adrià Vilanova Martínez · 2 years, 9 months ago