Cannot upgrade nuget packages for Xamarin.Android
<p>I started blank cross-platform projects in Visual Studio 2015 update 2: Visual C# -> Cross-platform -> Blank App (Xamarin.Forms portable).</p>

<p>It created 6 projects in the solution. Then I tried to update nugget packages for all of them. Needless to say the firs problem I encountered was the <a href="https://forums.xamarin.com/discussion/58755/android-project-shows-error-after-updating-to-xamarin-forms-2-0-0-6490">unnecessary reference to *design assemblies</a>. I managed to corrected it.</p>

<p>Then I got following message when I see 6 nuget packages are ready to update, 5 of them are for Andriod, and 1 is the newer version of Xamarin.Forms.</p>

<p><code>Unable to resolve dependencies. 'Xamarin.Android.Support.Design 23.2.1' is not compatible with 'Xamarin.Forms 2.1.0.6529 constraint: Xamarin.Android.Support.Design (= 23.0.1.3)'.</code></p>

<p>So when Xamarin published new version of packages, there was no consideration of the compatibility among them?</p>