Revert "Use develop build of Oxide.Common"

This reverts commit 9e6f3d9.

Author: MrBlue

src/Oxide.Core.csproj

@@ -18,7 +18,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Lib.Harmony" Version="2.3.1.1" />
-    <PackageReference Include="Oxide.Common" Version="2.0.21-develop" />
+    <PackageReference Include="Oxide.Common" Version="2.0.*" />
     <PackageReference Include="Oxide.References" Version="2.0.*">
       <PrivateAssets>contentfiles;analyzers;build</PrivateAssets>
     </PackageReference>