Bump MvvmCross from 7.0.1 to 7.1.1 (#52)

Bumps [MvvmCross](https://github.com/MvvmCross/MvvmCross) from 7.0.1 to 7.1.1.
- [Release notes](https://github.com/MvvmCross/MvvmCross/releases)
- [Changelog](https://github.com/MvvmCross/MvvmCross/blob/develop/CHANGELOG.md)
- [Commits](MvvmCross/MvvmCross@7.0.1...7.1.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

CastIt.GoogleCast/CastIt.GoogleCast.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="MvvmCross" Version="7.0.1" />
+    <PackageReference Include="MvvmCross" Version="7.1.1" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
     <PackageReference Include="protobuf-net" Version="3.0.29" />
     <PackageReference Include="Zeroconf" Version="3.4.2" />

CastIt/CastIt.csproj

@@ -32,7 +32,7 @@
     <PackageReference Include="Microsoft.AppCenter.Analytics" Version="3.4.3" />
     <PackageReference Include="Microsoft.AppCenter.Crashes" Version="3.4.3" />
     <PackageReference Include="Microsoft.Xaml.Behaviors.Wpf" Version="1.1.19" />
-    <PackageReference Include="MvvmCross" Version="7.0.1" />
+    <PackageReference Include="MvvmCross" Version="7.1.1" />
     <PackageReference Include="MvvmCross.Platforms.Wpf" Version="7.0.1" />
     <PackageReference Include="MvvmCross.Plugin.Messenger" Version="7.0.1" />
     <PackageReference Include="MvvmCross.Plugin.ResxLocalization" Version="7.0.1" />