bump version to 2.21.0

Author: adrianoc

Cecilifier.Common.props

@@ -2,7 +2,7 @@
   <PropertyGroup>
     <TargetFramework>net8.0</TargetFramework>
     <LangVersion>12</LangVersion>
-    <AssemblyVersion>2.20.0</AssemblyVersion>
+    <AssemblyVersion>2.21.0</AssemblyVersion>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
 
     <!-- Only copy english resource assemblies -->