Merge pull request liip#1370 from phproberto/fix/undefined-quality-key

Undefined quality key. Fixes liip#1310

Merge pull request liip#1361 from javiereguiluz/doc_strong

[Doc] Simplified the "strong" role

Merge pull request liip#1350 from ossinkine/suggest-templating

Suggest symfony/templating instead of requiring deprecated component

Merge pull request liip#1316 from fbourigault/re-enable-functional-tests

Fix skipped functional tests with Symfony 5.x

[Full Changelog](liip/LiipImagineBundle@2.2.0...2.3.0)

**Merged pull requests:**
- Upgrading to Symfony5 [\liip#1246](liip#1246) ([michellesanver](https://github.com/michellesanver))
- Upgrading to Symfony5 [\liip#1257](liip#1256) ([weaverryan](https://github.com/weaverryan))
- Eliminate root_dir usage [\liip#1255](liip#1255) ([Guite](https://github.com/guite))
- Remove non-functional allow\_upscale reference [\liip#1257](liip#1257) ([Yopai](https://github.com/Yopai))
- Remove unused packages [\liip#1251](liip#1251) ([franmomu](https://github.com/franmomu))
- Fixing bug where apply tag was used but allowed non-supported Twig versions [\liip#1249](liip#1249) ([weaverryan](https://github.com/weaverryan))
- Use PHPUnit 7.5 and test clean up [\liip#1243](liip#1243) ([franmomu](https://github.com/franmomu))
- Fix RemoveCacheCommand with empty path [\liip#1239](liip#1239) ([franmomu](https://github.com/franmomu))
- Update UPGRADE.md with a bc break notice [\liip#1235](liip#1235) ([franmomu](https://github.com/franmomu))
- Add missing fixed loader service [\liip#1232](liip#1232) ([franmomu](https://github.com/franmomu))
- Update orientation documentation [\liip#1231](liip#1231) ([franmomu](https://github.com/franmomu))

[Full Changelog](liip/LiipImagineBundle@2.1.0...2.2.0)

Update CHANGELOG.md