add prettier

Author: seveibar

package.json

@@ -45,7 +45,9 @@
     "build:babel": "NODE_ENV=production babel ./src --ignore \"src/**/*.story.js\" --out-dir=./dist && rm dist/index.js && cp dist/lib.js dist/index.js",
     "build-storybook": "build-storybook",
     "build:gh-pages": "react-scripts build && mkdir build/demo && cp build/index.html build/demo/index.html",
-    "gh-pages": "npm run build:gh-pages && gh-pages -d build"
+    "gh-pages": "npm run build:gh-pages && gh-pages -d build",
+    "prettier": "prettier --write \"src/**/*.js\"",
+    "prettier:test": "prettier --check \"src/**/*.js\""
   },
   "eslintConfig": {
     "extends": "react-app"
@@ -66,6 +68,7 @@
     "babel-loader": "^8.0.5",
     "babel-preset-react-app": "^7.0.0",
     "gh-pages": "^2.0.1",
+    "prettier": "^2.0.4",
     "raw.macro": "^0.3.0",
     "react-github-btn": "^1.1.1",
     "react-scripts": "^2.1.8"

yarn.lock

@@ -12771,6 +12771,11 @@ preserve@^0.2.0:
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
   integrity sha1-gV7R9uvGWSb4ZbMQwHE7yzMVzks=
 
+prettier@2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.0.2.tgz#1ba8f3eb92231e769b7fcd7cb73ae1b6b74ade08"
+  integrity sha512-5xJQIPT8BraI7ZnaDwSbu5zLrB6vvi8hVV58yHQ+QK64qrY40dULy0HSRlQ2/2IdzeBpjhDkqdcFBnFeDEMVdg==
+
 prettier@^1.16.4:
   version "1.19.1"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.19.1.tgz#f7d7f5ff8a9cd872a7be4ca142095956a60797cb"