fix: Detect platform word size based on `SIZE_MAX` #165

Job	Run time
makefile-analysis	41s
makefile-alpine-amd64-gcc	13s
cmake-ubuntu-20.04-x86_64	7s
cmake-ubuntu-20.04-i686	24s
cmake-macos-11-x86_64	15s
cmake-alpine-amd64-gcc	12s
cmake-alpine-armv7-gcc	1m 3s
cmake-windows-2019-x86_64	30s
makefile-ubuntu-20.04-amd64-gcc	5s
cmake-alpine-armv7-clang	1m 28s
cmake-windows-2019-i686	32s
makefile-ubuntu-20.04-amd64-gcc +openmp	7s
cmake-alpine-aarch64-gcc	1m 34s
makefile-ubuntu-20.04-amd64-clang	9s
cmake-alpine-aarch64-clang	1m 46s
makefile-ubuntu-20.04-amd64-clang +openmp	9s
makefile-alpine-armv7-gcc	1m 17s
cmake-alpine-s390x-gcc	1m 36s
makefile-macos-11-amd64-clang	17s
makefile-alpine-armv7-clang	1m 16s
cmake-alpine-s390x-clang	1m 58s
makefile-alpine-aarch64-gcc	1m 18s
cmake-alpine-ppc64le-gcc	1m 12s
cmake-alpine-ppc64le-clang	1m 46s
makefile-alpine-aarch64-clang	1m 24s
makefile-alpine-s390x-gcc	1m 10s
makefile-alpine-s390x-clang	1m 38s
makefile-alpine-ppc64le-gcc	57s
makefile-alpine-ppc64le-clang	1m 20s
	26m 24s

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