Lock down eslint to 2.2.x.

Author: beefancohen

package.json

@@ -30,7 +30,7 @@
     "babel-eslint": "^5.0.0",
     "babel-preset-es2015": "^6.6.0",
     "coveralls": "^2.11.8",
-    "eslint": "^2.2.0",
+    "eslint": "2.2.x",
     "istanbul": "^1.0.0-alpha.2",
     "mocha": "^2.4.5",
     "rimraf": "^2.5.2"