chore(deps): update all outdated packages to latest version

- Update @commitlint/cli to v9.1.2
- Update @commitlint/config-conventional to v9.1.2
- Update @typescript-eslint/eslint-plugin to v4.0.1
- Update @typescript-eslint/parser to v4.0.1
- Update eslint to v7.8.1
- Update lint-staged to v10.3.0
- Update prettier to v2.1.1
- Update typescript to v4.0.2

Author: jdbruijn