rolling back MLib version

Merge pull request #1 from Dirkster99/NetCore3

Mutlitargeting NetCore 3/.Net4

Updated dependency to new numeric control release with added mouse dr…

…ag support

Merge branch 'master' of https://github.com/Dirkster99/ColorPickerLib

This is ColorPickerLib V1.4

Enhanced Dark/Light themes and demo controls and replaced repeatbutto…

…ns with updownnumericcontrollib from nuget

Set minimal required .Net version to 4.0 Client Profile (instead pf 4…

….5). And increaded library version to 1.1.

Update README.md