Update NuGet spec to only include the necessary assemblies in the package

Author: augustoproiete

Serilog.Enrichers.ClientInfo.nuspec

@@ -28,8 +28,8 @@
     </dependencies>  
   </metadata>
   <files>
-      <file src="src\Serilog.Enrichers.ClientInfo\bin\$target$\net452\*.dll" target="lib/net452" />
-      <file src="src\Serilog.Enrichers.ClientInfo\bin\$target$\netstandard2.0\*.dll" target="lib/netstandard2.0" />
-      <file src="src\Serilog.Enrichers.ClientInfo\bin\$target$\netstandard2.1\*.dll" target="lib/netstandard2.1" />
+    <file src="src\Serilog.Enrichers.ClientInfo\bin\$target$\net452\Serilog.Enrichers.ClientInfo.dll" target="lib/net452" />
+    <file src="src\Serilog.Enrichers.ClientInfo\bin\$target$\netstandard2.0\Serilog.Enrichers.ClientInfo.dll" target="lib/netstandard2.0" />
+    <file src="src\Serilog.Enrichers.ClientInfo\bin\$target$\netstandard2.1\Serilog.Enrichers.ClientInfo.dll" target="lib/netstandard2.1" />
   </files>  
 </package>