Update version, update copyright

Author: tilkinsc

Lua.NET.csproj

@@ -5,9 +5,9 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
 	  <PackageId>Lua.NET</PackageId>
-    <Version>2.0.0</Version>
+    <Version>2.1.0</Version>
     <Authors>Cody Tilkins</Authors>
-    <Copyright>Copyright © Cody Tilkins 2022</Copyright>
+    <Copyright>Copyright © Cody Tilkins 2023</Copyright>
     <Title>Lua.NET</Title>
     <Product>Lua.NET</Product>
     <PackageIcon>Lua.NET.Logo.png</PackageIcon>