Enforce short array notations in stub files
Add required description to all composer.json files
Replace bindShared() with singleton().
Merge pull request #6298 from lucasmichot/5.0-composer-description

[5.0] Add A Description To All composer.json Files
Merge pull request #6270 from lucasmichot/5.0-stub-short-arrays

[5.0] Enforce Short Array Notation In Stub Files