test

Support hash size that's not std::size_t #477

Job	Run time
build-spm	24s
docs	1m 15s
build	1m 16s
check (Debug, gnu-6, 14)	1m 11s
check (Debug, gnu-7, 14)	1m 14s
check (Debug, llvm-5, 14)	1m 7s
check (Debug, llvm-6, 14)	1m 5s
check (Release, gnu-6, 14)	1m 19s
check (Release, gnu-7, 14)	1m 2s
check (Release, llvm-5, 14)	1m 4s
check (Release, llvm-6, 14)	1m 5s
check (Debug, gnu-9, 14, coverage)	1m 8s
check (Debug, gnu-8, 17)	1m 1s
check (Debug, llvm-9, 17, fuzzers)	1m 4s
check (Debug, gnu-11, 20)	1m 20s
check (Debug, llvm-13, 20)	1m 5s
check (Debug, llvm-8, 14, sanitize)	1m 18s
check (Release, gnu-9, 14, benchmark)	1m 8s
check (Release, llvm-10, 14, benchmark)	1m 4s
	21m 10s

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