Bump version to 4.2.0 in `Directory.Build.props`

src/Directory.Build.props

@@ -1,10 +1,9 @@
 <Project>
     <PropertyGroup>
         <Nullable>enable</Nullable>
-        <AvaloniaVersion>11.3.8</AvaloniaVersion>
-        <VersionPrefix>4.1.2</VersionPrefix>
+        <VersionPrefix>4.2.0</VersionPrefix>
         <VersionSuffix></VersionSuffix>
-        <AssemblyVersion>4.1.2.0</AssemblyVersion>
-        <FileVersion>4.1.2</FileVersion>
+        <AssemblyVersion>4.2.0.0</AssemblyVersion>
+        <FileVersion>4.2.0</FileVersion>
     </PropertyGroup>
 </Project>