Build

Modernize AppVeyor configuration #4531

Job	Run time
FreeBSD Debug x86_64	9m 3s
Windows Debug x64 (msvc)	6m 56s
FreeBSD Release x86_64	22m 6s
Ubuntu Debug amd64 (gcc)	6m 9s
Windows Debug x86 (msvc)	6m 48s
OpenBSD Debug x86_64	28m 17s
Ubuntu Release amd64 (gcc)	6m 13s
Windows Mixed x64 (msvc)	6m 35s
Ubuntu Debug amd64 (clang)	6m 28s
OpenBSD Release x86_64	35m 9s
Windows Mixed x86 (msvc)	6m 7s
Ubuntu Release amd64 (clang)	9m 25s
Windows Release x64 (msvc)	11m 26s
Alpine Debug x86_64 (gcc)	6m 52s
Windows Release x86 (msvc)	10m 19s
Alpine Release x86_64 (gcc)	8m 58s
Alpine Debug x86 (gcc)	7m 55s
Windows Release Master Gold x64 (msvc)	9m 44s
Alpine Release x86 (gcc)	9m 58s
Windows Release Master Gold x86 (msvc)	8m 58s
Fedora Debug x86_64 (gcc)	7m 9s
Fedora Release x86_64 (gcc)	7m 54s
macOS Debug x86_64 (clang)	2m 33s
macOS Release x86_64 (clang)	1m 49s
macOS Debug arm64 (clang)	4m 18s
macOS Release arm64 (clang)	5m 3s
	4h 12m 12s

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