textproc/libxml++: Update to 5.2.0
- Add USES= compiler:c++17-lang
- Remove USES= python:build
- Add LICENSE_FILE
- Fix install path of .pc file
- Make some minor changes to port Makefile
Changelog:
https://github.com/libxmlplusplus/libxmlplusplus/releases/tag/5.2.0
PR: 279757
Approved by: portmgr (maintainer timeout, 2+ weeks)