Only lint before commit

Author: leo

package.json

@@ -8,11 +8,12 @@
     "bin"
   ],
   "scripts": {
-    "precommit": "npm run test",
+    "precommit": "npm run lint",
     "prepublish": "npm run build",
     "pretest": "npm run build",
     "build": "mkdir -p dist && async-to-gen lib/index.js > dist/index.js",
-    "test": "xo && ava"
+    "lint": "xo",
+    "test": "npm run lint && ava"
   },
   "ava": {
     "require": [