Refactor HSV/HSL color manipulation as System.Windows.Media.Color class extension

Author: pomianowski

Directory.Build.props

@@ -1,6 +1,9 @@
 <Project>
   <PropertyGroup>
     <Version>1.2.1</Version>
-    <Copyright>2021 lepo.co - WPF UI</Copyright>
+    <LangVersion>latest</LangVersion>
+    <Authors>lepo.co</Authors>
+    <Company>lepo.co</Company>
+    <Copyright>Copyright (C) 2021-2022 Leszek Pomianowski and WPF UI Contributors</Copyright>
   </PropertyGroup>
 </Project>