add prettierrc file & added node in bin file script

Author: adeelibr

.prettierrc

@@ -0,0 +1,6 @@
+{
+  "printWidth": 80,
+  "semi": true,
+  "singleQuote": true,
+  "trailingComma": "es5"
+}

bin/index.js

@@ -1,4 +1,5 @@
-#!/usr/bin/env;
+#!/usr/bin/env node
+
 const spawn = require('react-dev-utils/crossSpawn');
 const chalk = require('react-dev-utils/chalk');
 const args = process.argv.slice(2);