How do I make my child theme’s CSS update when I save it?

CloudFlare was caching my CSS files. I diagnosed this by selectively purging the CSS file from the cache, and then solved the issue by turning on “Development Mode”, all via the CloudFlare dashboard.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)