Minor bugfix of minor bugfix...

Better handling of the Mac Mini HDMI situation

Blacklisted known HDMI dummy
General stability improvements for arm64
Lazy display update implemented if configuration change is requested (waits 2 seconds until it performs actual display update since MacOS usually sends 4-8 config change signals which made changes very costly)

fix: Big Sur crash when using contrast slider

fix(Intel): hacky workaround for ddc unreliability

Requires a proper fix in the future, see:
MonitorControl#478

Fixed error in i2c checksum calculation. Changed communication wait a…

…nd repeat times.

Bump build for 3.0.0-beta1 release + build tools ran

Release 2.1.0

Release 2.0.0 🎉

Bump version

Update DDC.swift

See MonitorControl#102 - fixed compatibility with some monitors
(thanks to @KNNSpeed for providing a solution)