Don't test netcoreapp1.1, which will be EOL soon

Author: dustinsoftware

tests/React.Tests/React.Tests.csproj

@@ -4,13 +4,12 @@
     <Copyright>Copyright 2014-Present Facebook, Inc</Copyright>
     <AssemblyTitle>ReactJS.NET Unit Tests</AssemblyTitle>
     <Authors>Daniel Lo Nigro</Authors>
-    <TargetFrameworks>net452;netcoreapp1.1;netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>net452;netcoreapp2.0</TargetFrameworks>
     <AssemblyName>React.Tests</AssemblyName>
     <AssemblyOriginatorKeyFile>../../src/key.snk</AssemblyOriginatorKeyFile>
     <SignAssembly>true</SignAssembly>
     <PublicSign Condition=" '$(OS)' != 'Windows_NT' ">true</PublicSign>
     <PackageId>React.Tests</PackageId>
-    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.1' ">1.1</RuntimeFrameworkVersion>
     <GenerateRuntimeConfigurationFiles>true</GenerateRuntimeConfigurationFiles>
     <GenerateAssemblyTitleAttribute>false</GenerateAssemblyTitleAttribute>
     <GenerateAssemblyDescriptionAttribute>false</GenerateAssemblyDescriptionAttribute>