Update pre-commit hook regex and exit logic
Update pre-commit hook regex and exit logic

Standard defaults to matching all files with the extension .js or .jsx
Update pre-commit hook to match files with both extensions.
Update pre-commit hook to only exit upon failure of command.
feross/standard,LinusU/standard,standard/standard,jasonpincin/standard,LinusU/standard,JedWatson/happiness,SimenB/standard,standard/standard,feross/standard,JedWatson/happiness,SimenB/standard