ci: fix GitHub Actions `release` job

fix: return zero vector for gamepad sticks when no gamepad is connected

fix: update Rollup and emit type definitions

docs: add `GamepadStick.label` to documentation

fix: change main files

feat(gamepad): reject non-standard gamepads

When a gamepad connects, Contro will now check whether its `mapping`
equals `standard` and reject it if it doesn't.

Closes #2

fix(*): replace truthiness check with `hasOwnProperty`

Release v2.0.0

feat(build): add banner to all output files

fix(build): remove comments from emitted files