Upgrade ProtoBufJsonConverter to fix issue with dot(s) in package name

Author: StefH

src/WireMock.Net/WireMock.Net.csproj

@@ -153,7 +153,7 @@
         <PackageReference Include="GraphQL" Version="7.5.0" />
         <PackageReference Include="GraphQL.NewtonsoftJson" Version="7.5.0" />
         <PackageReference Include="MimeKitLite" Version="4.1.0.1" />
-        <PackageReference Include="ProtoBufJsonConverter" Version="0.2.0" />
+        <PackageReference Include="ProtoBufJsonConverter" Version="0.3.0" />
     </ItemGroup>
 
     <ItemGroup Condition=" '$(TargetFramework)' == 'netcoreapp3.1' ">