Meson

Match our isupper with python behavior #39

Job	Run time
ubuntu-22.04, sanitize debug compiled	21s
macos-latest, default release compiled	20s
ubuntu-22.04, clang debug compiled	17s
windows-2022, gcc debug compiled	1m 1s
windows-2022, gcc release compiled	50s
ubuntu-22.04, clang+sanitize debug compiled	16s
ubuntu-22.04, default release compiled	23s
windows-2022, default release header-only	43s
macos-latest, default debug compiled	17s
windows-2022, clang-cl+sanitize release compiled	52s
ubuntu-22.04, default debug compiled	17s
windows-2022, default debug compiled	40s
ubuntu-22.04, clang+sanitize release compiled	32s
windows-2022, sanitize+asanonly release compiled	46s
ubuntu-22.04, default release header-only	22s
windows-2022, sanitize+asanonly debug compiled	1m 0s
windows-2022, default release compiled	48s
macos-latest, default release header-only	19s
ubuntu-22.04, clang release compiled	25s
ubuntu-22.04, sanitize release compiled	57s
windows-2022, clang-cl+sanitize debug compiled	43s
	12m 9s

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