2.0.0+adafruit - same as 2.0.0-rc.0+adafruit

rc.0 seems OK, so this is simply a relabeling of 2.0.0-rc.0+adafruit as a stable release.

What's Changed

• update actions version by @FoamyGuy in #65
• Sync with upstream by @hathach in #62

Full Changelog: 1.7.7...2.0.0+adafruit