Browsers can be made to cache assets aggressively. This creates problems when we update KR, but browsers don't recognize the changes in JS/CSS.
KR should implement a simple asset cache busting mechanism, for example based on filemtime()
or any hash algorithm.
BAD
https://.../vendor/koolphp/koolreport/src/clients/core/KoolReport.js
BETTER
https://.../vendor/koolphp/koolreport/src/clients/core/KoolReport.js?ver=1550137991