Bump Microsoft.AspNetCore.App

Bumps [Microsoft.AspNetCore.App](https://github.com/aspnet/Universe) from 2.1.2 to 2.1.4.
- [Release notes](https://github.com/aspnet/Universe/releases)
- [Changelog](https://github.com/aspnet/Universe/blob/master/docs/CrossRepoBreakingChanges.md)
- [Commits](aspnet/Universe@2.1.2...2.1.4)

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

Community.AspNetCore.ExceptionHandling.Tests/Community.AspNetCore.ExceptionHandling.Tests.csproj

@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.App" Version="2.1.2" />
+    <PackageReference Include="Microsoft.AspNetCore.App" Version="2.1.4" />
     <PackageReference Include="Microsoft.AspNetCore.Buffering" Version="0.2.2" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="2.1.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.7.0" />