feat(prettier): make prettier opt-out (#153)

Author: glebec

package.json

@@ -13,7 +13,7 @@
     "heroku-token": "script/encrypt-heroku-auth-token",
     "lint": "eslint ./ --ignore-path .gitignore",
     "lint-fix": "npm run lint -- --fix",
-    "precommit": "# lint-staged # un-comment to enable",
+    "precommit": "lint-staged",
     "prepare": "if [ -d .git ]; then npm-merge-driver install; fi",
     "prettify": "prettier --write \"**/*.{js,jsx,json,css,scss,md}\"",
     "postinstall": "touch secrets.js",