(GH-153) Update System.Collections.* to 4.3.0

* fixes #153

Author: devlead

src/LitJson/LitJSON.csproj

@@ -51,8 +51,8 @@ It's quick and lean, without external dependencies.</Description>
   </PropertyGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.5' ">
-    <PackageReference Include="System.Collections.NonGeneric" Version="4.0.1" />
-    <PackageReference Include="System.Collections.Specialized" Version="4.0.1" />
+    <PackageReference Include="System.Collections.NonGeneric" Version="4.3.0" />
+    <PackageReference Include="System.Collections.Specialized" Version="4.3.0" />
     <PackageReference Include="System.Reflection" Version="4.3.0" />
     <PackageReference Include="System.Reflection.TypeExtensions" Version="4.1.0" />
   </ItemGroup>