Use XSD 4.2.0 #994

Job	Run time
Build on Fedora to fedora:37	3m 17s
Run CodeQL tests	7m 7s
Run Coverity tests	0s
Build on Fedora to fedora:38	2m 48s
Build on macOS for osx	6m 15s
Build on macOS for ios	2m 27s
Deploy pages	0s
Build on macOS for iossimulator	4m 17s
Build on Windows (143)	1h 26m 9s
Build on Ubuntu to ubuntu:20.04	6m 8s
Build on macOS for androidarm	3m 41s
Build on Windows (142)	1h 12m 59s
Build on Ubuntu to ubuntu:22.04	4m 52s
Build on macOS for androidarm64	4m 4s
Build on Ubuntu to ubuntu:23.04	6m 46s
Build on macOS for androidx86_64	7m 32s
Build on Ubuntu to ubuntu:23.10	4m 50s
	3h 43m 12s

Provide feedback