Remove leftover variable.
Use Container contract.
Prettiness.
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 #6278 from franzliedke/patch-9

[5.0] Removed Leftover Variable
Merge pull request #6280 from franzliedke/patch-11

[5.0] Use Container Contract In Database Connection Factory