Grav 1.4.2 relased

Releasenotes:

1. • Added new |nicefilesize Twig filter for pretty file (auto converts to bytes, kB, MB, GB, etc)
   • Added new regex_filter() Twig function to values in arrays
2. • Added bosnian to lang codes #1917
   • Improved Zip extraction error codes #1922
3. • Fixed an issue with Markdown Video and Audio that broke after Parsedown 1.7.0 Security updates #1924
   • Fix for case-sensitive page metadata admin#1370
   • Fixed missing composer requirements for the new Grav\Framework\Uri classes
   • Added missing PSR-7 vendor library required for URI additions in Grav 1.4.0

You can get the new Version at getgrav.org or update via GPM / Admin Interface