Fix CI on Apple Silicon #71

Job	Run time
windows (lua53, lua5.3, 5.3, /mingw64/include/lua5.3/)	3m 14s
unix (5.1, ubuntu-latest)	40s
windows (lua, lua, 5.4, /mingw64/include/)	3m 5s
windows (luajit, luajit, 5.1, /mingw64/include/luajit-2.1/)	3m 51s
unix (5.1, macos-latest)	2m 13s
unix (5.2, ubuntu-latest)	41s
unix (5.2, macos-latest)	2m 8s
unix (5.3, ubuntu-latest)	38s
unix (5.3, macos-latest)	1m 54s
unix (5.4, ubuntu-latest)	43s
unix (5.4, macos-latest)	2m 10s
unix (luajit-2.1.0-beta3, ubuntu-latest)	58s
unix (luajit-2.1.0-beta3, macos-latest)	1m 44s
unix (luajit-openresty, ubuntu-latest)	45s
unix (luajit-openresty, macos-latest)	2m 3s
	26m 47s

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