Bump es6-promise dev

external/amber-dev/package.json

@@ -15,8 +15,8 @@
     "url": "https://github.com/amber-smalltalk/amber/issues?labels=in+devkit"
   },
   "dependencies": {
+    "amd-config-builder": "^0.2.0",
     "amdefine": "0.0.8",
-    "es6-promise": "^0.1.1",
-    "amd-config-builder": "^0.2.0"
+    "es6-promise": "^2.0.0"
   }
 }