Merge branch 'master' into gb/install-target-selectors

.github/dependabot.yml

.github/workflows/bootstrap.yml

.github/workflows/changelogs.yml

.github/workflows/quick-jobs.yml

.github/workflows/users-guide.yml

.github/workflows/validate.yml

.github/workflows/whitespace.yml

CONTRIBUTING.md

Cabal-syntax/Cabal-syntax.cabal

Cabal-syntax/src/Distribution/PackageDescription/Quirks.hs

Cabal-syntax/src/Distribution/Types/BenchmarkInterface.hs

Cabal-syntax/src/Distribution/Types/Condition.hs

Cabal-syntax/src/Distribution/Types/Flag.hs

Cabal-syntax/src/Distribution/Types/Library.hs

Cabal-syntax/src/Distribution/Types/LibraryVisibility.hs

Cabal-syntax/src/Distribution/Types/PkgconfigVersion.hs

Cabal-syntax/src/Distribution/Types/TestSuiteInterface.hs

Cabal-syntax/src/Distribution/Utils/ShortText.hs

Cabal-syntax/src/Distribution/Utils/Structured.hs

Cabal-syntax/src/Language/Haskell/Extension.hs