switch to typescript@next to avoid...

switch to typescript@next to avoid https://github.com/wechaty/wechaty/issues/40#issuecomment-252649976

package.json

@@ -116,7 +116,7 @@
     "ts-node": "^1.4.1",
     "tslint": "^3.15.1",
     "tuling123-client": "0.0.1",
-    "typescript": "^2.0.3",
+    "typescript": "^2.1.0-dev.20161010",
     "typings": "^1.4.0"
   },
   "files_comment__whitelist_npm_publish": "http://stackoverflow.com/a/8617868/1123955",