downgrade mvc core dependency to 1.0.1

Author: dotarj

src/PartialResponse.AspNetCore.Mvc.Formatters.Json/project.json

@@ -21,7 +21,7 @@
     "PartialResponse.Core": {
       "target": "project"
     },
-    "Microsoft.AspNetCore.Mvc.Core": "1.1.0",
+    "Microsoft.AspNetCore.Mvc.Core": "1.0.1",
     "NETStandard.Library": "1.6.1",
     "Newtonsoft.Json": "9.0.1"
   },