fix: Detect platform word size based on `SIZE_MAX` #173

Job	Run time
makefile-analysis	35s
makefile-alpine-amd64-gcc	11s
cmake-alpine-amd64-gcc	10s
makefile-alpine-armv7-gcc	1m 3s
cmake-alpine-armv7-gcc	1m 14s
makefile-alpine-armv7-clang	1m 18s
cmake-alpine-armv7-clang	1m 31s
cmake-ubuntu-20.04-x86_64	7s
makefile-alpine-aarch64-gcc	1m 14s
makefile-ubuntu-20.04-amd64-gcc	4s
cmake-alpine-aarch64-gcc	1m 28s
cmake-ubuntu-20.04-i686	17s
makefile-alpine-aarch64-clang	1m 18s
makefile-ubuntu-20.04-amd64-gcc +openmp	5s
cmake-alpine-aarch64-clang	1m 39s
makefile-alpine-s390x-gcc	1m 38s
cmake-macos-11-x86_64	16s
makefile-ubuntu-20.04-amd64-clang	10s
cmake-alpine-s390x-gcc	1m 15s
makefile-alpine-s390x-clang	1m 44s
cmake-windows-2019-x86_64	47s
makefile-ubuntu-20.04-amd64-clang +openmp	10s
cmake-alpine-s390x-clang	1m 58s
makefile-alpine-ppc64le-gcc	1m 1s
makefile-macos-11-amd64-clang	15s
cmake-windows-2019-i686	1m 12s
cmake-alpine-ppc64le-gcc	1m 7s
makefile-alpine-ppc64le-clang	1m 21s
cmake-alpine-ppc64le-clang	1m 39s
	26m 47s

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