list Promise and Uint8Array as global in src/ :

- as mentioned in the migration guide
  http://eslint.org/docs/user-guide/migrating-to-2.0.0

Author: etpinard

src/.eslintrc

@@ -3,6 +3,10 @@
   "env": {
     "browser": true
   },
+  "globals": {
+    "Promise": true,
+    "Uint8Array": true
+  },
   "rules": {
     "strict": [2, "global"]
   }