If you are using a CDN it can be used to effectively invalidate your CDN cache instantly. This extension will also bust any local versions of assets your visitors may have stored in their web browser cache. The extension can be installed via Packagist with Composer, and the source code is available on GitHub.
After some basic Web Server configuration the URL of your assets will include a new dynamic portion, eg. http://absolutecommerce.co.uk/static/version12345/some-stylesheet.css.
Magento 2 already has some functionality to bust cache for static files with the 'Sign Static Files' setting. The Absolute CacheBust extension provides this same functionality and more: