x11-fonts/py-QtAwesome: Update to 0.5.6

While I'm here:

• Pet portlint

Changelog:

• Some FontAwesome icons do not match
• Update update_fa5 command to rename internal font names during update
• Rename FA5 fonts to be unique
• Add a test to ensure all fonts used by QtAwesome have a unique family name

https://github.com/spyder-ide/qtawesome/blob/v0.5.6/CHANGELOG.md

PR: 236311
Submitted by: lbartoletti <lbartoletti@tuxfamily.org> (maintainer)
Approved by: tcberner (mentor)
Differential Revision: https://reviews.freebsd.org/D19517