Microsoft.AspNetCore.App changed to 2.1.5, client side dependencies updated

Author: liborpansky

AspNetCoreVueStarter.csproj

@@ -16,7 +16,7 @@
  </PropertyGroup>
 
  <ItemGroup>
- <PackageReference Include="Microsoft.AspNetCore.App" />
+ <PackageReference Include="Microsoft.AspNetCore.App" Version="2.1.5" />
  <PackageReference Include="Microsoft.AspNetCore.SpaServices.Extensions" Version="2.1.1" />
  <PackageReference Include="VueCliMiddleware" Version="2.1.1" />
  </ItemGroup>