chore(project-json): add Moq

Author: jaredcnance

test/JsonApiDotNetCoreExampleTests/project.json

@@ -11,7 +11,8 @@
     "dotnet-test-xunit": "2.2.0-preview2-build1029",
     "xunit": "2.2.0-beta5-build3474",
     "Bogus": "8.0.1-beta-1",
-    "Microsoft.DotNet.InternalAbstractions": "1.0.0"
+    "Microsoft.DotNet.InternalAbstractions": "1.0.0",
+    "Moq": "4.7.1"
   },
 
   "tools": {