Regular expression for matching a shebang line
$ npm install shebang-regex
```js const shebangRegex = require('shebang-regex');
const string = '#!/usr/bin/env node\nconsole.log("unicorns");';
shebangRegex.test(string); //=> true
shebangRegex.exec(string)[0]; //=> '#!/usr/bin/env node'
shebangRegex.exec(string)[1]; //=> '/usr/bin/env node' ```
MIT © Sindre Sorhus