Meson

Match our isupper with python behavior (#55) #43

Job	Run time
ubuntu-22.04, default debug compiled	14s
macos-latest, default debug compiled	22s
windows-2022, default debug compiled	37s
windows-2022, gcc debug compiled	49s
macos-latest, default release compiled	40s
windows-2022, clang-cl+sanitize debug compiled	45s
ubuntu-22.04, clang debug compiled	19s
ubuntu-22.04, clang release compiled	26s
macos-latest, default release header-only	31s
windows-2022, default release compiled	44s
windows-2022, sanitize+asanonly release compiled	41s
windows-2022, gcc release compiled	1m 1s
ubuntu-22.04, sanitize debug compiled	14s
windows-2022, clang-cl+sanitize release compiled	53s
windows-2022, sanitize+asanonly debug compiled	38s
ubuntu-22.04, clang+sanitize release compiled	29s
ubuntu-22.04, default release header-only	19s
windows-2022, default release header-only	44s
ubuntu-22.04, clang+sanitize debug compiled	25s
ubuntu-22.04, default release compiled	23s
ubuntu-22.04, sanitize release compiled	53s
	12m 7s

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