fixup! Upgrade to xUnit 2.0

Author: nulltoken

NuGet.Config

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <packageSources>
+    <add key="Public Feed" value="https://nuget.org/api/v2/" />
+    <add key="CI Packages (xunit)" value="https://www.myget.org/F/xunit/" />
+  </packageSources>
+  <disabledPackageSources />
+  <activePackageSource>
+    <add key="All" value="(Aggregate source)"  />
+  </activePackageSource>
+</configuration>