Merge pull request #494 from isuruf/cython31 #339

Job	Run time
build (Debug, yes, 3.12, yes, ubuntu-20.04, gcc)	3m 30s
build (Debug, yes, 3.11, yes, ubuntu-20.04, gcc)	3m 20s
build (Debug, yes, 3.10, yes, ubuntu-20.04, gcc)	3m 35s
build (Debug, yes, 3.9, yes, ubuntu-20.04, gcc)	3m 22s
build (Release, 3.8, yes, ubuntu-20.04, gcc)	4m 21s
build (Release, 3.8, yes, gmpxx, no, ubuntu-20.04, gcc)	4m 32s
build (Release, 3.8, yes, ubuntu-20.04, gcc)	4m 27s
build (Release, yes, 3.8, ubuntu-20.04, gcc)	4m 24s
build (Release, 3.9, yes, ubuntu-20.04, gcc)	4m 27s
build (Release, 3.9, yes, flint, yes, ubuntu-20.04, gcc)	4m 36s
build (Debug, 3.8, yes, yes, ubuntu-20.04, clang)	3m 4s
build (Release, 3.8, yes, ubuntu-20.04, clang)	3m 55s
build (Debug, 3.10, yes, 14, yes, boostmp, -k "not integer_nthroot", ubuntu-22.04, deb http://apt...	5m 5s
build (Debug, 3.8, yes, 5, macos-13, clang)	9m 23s
build (Release, 3.9, no, macos-13, clang)	7m 34s
build (Debug, 3.8, no, macos-13, gcc)	5m 24s
build (Release, 3.8, macos-13, gcc)	7m 25s
build (Release, 3.11, ubuntu-20.04, yes, yes, yes, yes, yes, yes, flint, yes, gcc)	4m 48s
	1h 27m 12s

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