Merge pull request #80 from elbeno/add-clang-20 #227

Job	Run time
build_and_test_22 (clang, 15, 20, libc++, Debug)	3m 11s
quality_checks_pass	1m 21s
build_and_test_22 (clang, 15, 20, libstdc++, Debug)	1m 37s
build_and_test_22 (clang, 14, 20, libc++, Debug)	2m 12s
sanitize (address, clang)	2m 38s
sanitize (undefined, clang)	2m 51s
build_and_test_24 (clang, 16, 20, libstdc++, Debug)	2m 26s
sanitize (undefined, gcc)	2m 6s
sanitize (thread, clang)	2m 1s
sanitize (address, gcc)	2m 28s
sanitize (thread, gcc)	2m 20s
build_and_test_24 (clang, 17, 20, libstdc++, Debug)	2m 15s
build_and_test_24 (clang, 16, 20, libc++, Debug)	2m 23s
valgrind	2m 29s
build_and_test_24 (clang, 18, 20, libstdc++, Debug)	2m 20s
build_and_test_24 (clang, 19, 20, libc++, Debug)	2m 33s
build_and_test_24 (clang, 17, 20, libc++, Debug)	2m 27s
build_and_test_24 (clang, 18, 20, libc++, Debug)	2m 39s
build_and_test_24 (clang, 20, 20, libstdc++, Debug)	2m 13s
build_and_test_24 (clang, 20, 20, libc++, Debug)	2m 41s
build_and_test_24 (clang, 19, 20, libstdc++, Debug)	2m 15s
build_and_test_24 (gcc, 13, 20, libstdc++, Debug)	2m 17s
build_and_test_24 (gcc, 12, 20, libstdc++, Debug)	2m 16s
merge_ok	5s
	54m 4s

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