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

Bump for release 2.2.0 (MonitorControl#476)

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)

🔧 Fix cyclomatic complexity warning