pin typescript version to patch releases

package.json

@@ -57,7 +57,7 @@
     "rimraf": "^2.5.0",
     "style-loader": "^0.13.0",
     "typedoc": "^0.5.0",
-    "typescript": "^2.0.3",
+    "typescript": "~2.0.3",
     "url-loader": "^0.5.7",
     "watch": "^0.17.1",
     "webpack": "^1.12.11"