php-cs-fixer

On fishshell when I run php-cs-fixer the result is:

```bash
Failed to execute process '/usr/local/bin/php-cs-fixer'. Reason:
exec: Exec format error
The file '/usr/local/bin/php-cs-fixer' is marked as an executable but could not be run by the operating system.
```
Adding shebang on script to fix this.