Changed back typescript version

package.json

diff --git a/package.json b/package.json
index 3d1cae0..9a3a914 100644
--- a/package.json
+++ b/package.json
@@ -60,6 +60,6 @@
     "protractor": "~5.1.0",
     "ts-node": "~2.0.0",
     "tslint": "~4.5.0",
-    "typescript": "~2.2.0"
+    "typescript": "~2.1.0"
   }
 }