Remove dependency on .NETStandard for frameworks that don't use it

build.cake

@@ -370,7 +370,7 @@ Task("NuGet")
 		NuGetPack(spec, new NuGetPackSettings {
 			BasePath = basePath,
 			Verbosity = NuGetVerbosity.Detailed,
-			Version = module.NuGetVersion
+			Version = "0.5.0-test"//module.NuGetVersion
 		});
 
 		// Clean up

nuget/MacMobileCenter.nuspec

@@ -16,6 +16,11 @@
         <group targetFramework="netstandard1.0">
             <dependency id="NETStandard.Library" version="1.6.1" />
         </group>
+        <!-- Use dependency groups for iOS and Android so that NETStandard dependencies aren't added to them -->
+        <group targetFramework="MonoAndroid403">
+        </group>
+        <group targetFramework="Xamarin.iOS10">
+        </group>
     </dependencies>
   </metadata>
   <files>

nuget/MobileCenter.nuspec

@@ -21,6 +21,11 @@
         <dependency id="Newtonsoft.Json" version="6.0.1"/>
         <dependency id="sqlite-net-pcl" version="1.3.1"/>
       </group>
+      <!-- Use dependency groups for iOS and Android so that NETStandard dependencies aren't added to them -->
+      <group targetFramework="MonoAndroid403">
+      </group>
+      <group targetFramework="Xamarin.iOS10">
+      </group>
     </dependencies>
     <version>$version$</version>
   </metadata>