decide point equality (#1848) #834

Job	Run time
install (dev, 4.11.1, Ubuntu, ubuntu-latest)	40m 34s
install (dev, 4.11.1, macOS, macos-latest)	53m 51s
install (dev, 4.11.1, Windows, windows-latest, -async-proofs-j 1, opam-repository-mingw: https://...	1h 34m 36s
install (8.19.0, 4.11.1, Ubuntu, ubuntu-latest)	39m 7s
install (8.19.0, 4.11.1, macOS, macos-latest)	54m 16s
install (8.19.0, 4.11.1, Windows, windows-latest, -async-proofs-j 1, opam-repository-mingw: https...	1h 33m 41s
install (8.18.0, 4.11.1, Ubuntu, ubuntu-latest)	40m 23s
install (8.18.0, 4.11.1, macOS, macos-latest)	47m 37s
install (8.18.0, 4.11.1, Windows, windows-latest, -async-proofs-j 1, opam-repository-mingw: https...	1h 37m 48s
	9h 21m 53s

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