build: fix lint for md

Author: Scrum

package.json

@@ -70,7 +70,7 @@
   },
   "lint-staged": {
     "{src,test}/**/*.js": "eslint",
-    "./*.md": "eslint --rule indent: [error, 4] ."
+    "*.md": "eslint"
   },
   "ava": {
     "require": [