Add npm scripts to run Prettier

Author: alexesprit

.prettierignore

@@ -0,0 +1,2 @@
+package.json
+package-lock.json

package.json

@@ -40,7 +40,9 @@
   },
   "scripts": {
     "lint": "eslint --config index.js \"**/*.js\"",
-    "test": "tape test/*"
+    "test": "tape test/*",
+    "format": "prettier --write .",
+    "format:check": "prettier --check ."
   },
   "prettier": "prettier-config-web-scrobbler"
 }