language: add missing dependency (#1827)

Author: callmehiphop

packages/language/package.json

@@ -65,6 +65,7 @@
     "mocha": "^3.0.2",
     "node-uuid": "^1.4.7",
     "proxyquire": "^1.7.10",
+    "string-format-obj": "^1.1.0",
     "through2": "^2.0.1"
   },
   "scripts": {