Updating to RTM builds of xunit and Moq (#25)

test/Microsoft.AspNetCore.SignalR.SqlServer.Tests/project.json

@@ -1,8 +1,8 @@
 {
   "dependencies": {
     "Microsoft.AspNetCore.SignalR.SqlServer": "0.2.0-*",
-    "xunit": "2.1.0",
-    "Moq": "4.2.1312.1622"
+    "xunit": "2.2.0-*",
+    "Moq": "4.6.25-*"
   },
   "buildOptions": {
     "allowUnsafe": true,