Meson

Match our isupper with python behavior (#55) #41

Job	Run time
macos-latest, default debug compiled	21s
ubuntu-22.04, default debug compiled	12s
windows-2022, gcc release compiled	57s
windows-2022, sanitize+asanonly debug compiled	39s
windows-2022, default debug compiled	42s
ubuntu-22.04, sanitize release compiled	50s
ubuntu-22.04, sanitize debug compiled	16s
ubuntu-22.04, clang debug compiled	19s
windows-2022, clang-cl+sanitize debug compiled	1m 22s
windows-2022, gcc debug compiled	44s
ubuntu-22.04, clang release compiled	24s
ubuntu-22.04, clang+sanitize release compiled	35s
ubuntu-22.04, default release compiled	22s
ubuntu-22.04, clang+sanitize debug compiled	25s
windows-2022, clang-cl+sanitize release compiled	50s
windows-2022, default release compiled	42s
ubuntu-22.04, default release header-only	24s
macos-latest, default release compiled	34s
windows-2022, default release header-only	1m 23s
macos-latest, default release header-only	28s
windows-2022, sanitize+asanonly release compiled	49s
	13m 18s

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