Releasing 2.0.3

Added attributes to comply with CLS-Compliant Code spec

Author: ENikS

src/CommonServiceLocator.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <Version>2.0.2</Version>
+    <Version>2.0.3</Version>
     <PackageReleaseNotes>This release contains a portable class library that targets .NET 4.0, 4.5, and 4.7, .NET Core 1.0, .NET Standard 1.0 and .NET Standard 2.0</PackageReleaseNotes>
   </PropertyGroup>