Release 2.1.0

- Add -bs (bad security) option
- Fix Issue 57 (SPDX spelling error #39)
- Fix Issue 59 (meson install settings)
- Fix Issue 55 (npd)
- Fix Issue 56 (npd)
- Fix Issue 58 (#40 config)
- Improve release procedure
- Add miniscule test suite
- Adjust Cagebreak to wlroots 0.16.2
- New GPG Keys