Add CodeQL analysis for GitHub Actions

Merge pull request #620 from gaphor/fix-supertype-lookup

Fix regression where super-types are not looked up

Merge pull request #592 from gaphor/update-deps

Update dependencies

Merge pull request #531 from gaphor/remove-skip-check

Merge pull request #361 from gaphor/release-1.1.2

Prepare for version 1.1.2 release

Fix upload-release-assets doesn't have write permissions

Bump version to 1.1.0

Bump version to 1.0.1

Prepare for 1.0.0 release

Bump to 1.0.0b1