* Upgrade to GitHub-native Dependabot

* chore: ignore all get-folder-size updates

This is due to it requiring Node 14, and Node 12 isn't EOL until April 2022.

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: Mark Lee <malept@users.noreply.github.com>