`isPowerOfTen` now takes decimals. #251

Job	Run time
build (ubuntu-latest, Release, clang, 3.10)	4m 35s
build (ubuntu-latest, Release, clang, 3.10)	4m 35s
build (ubuntu-latest, Release, clang, 3.11)	7m 34s
build (ubuntu-latest, Release, clang, 3.11)	5m 17s
build (ubuntu-latest, Release, clang, 3.12)	4m 34s
build (ubuntu-latest, Release, clang, 3.12)	4m 34s
build (windows-latest, Release, cl, 3.10)	3m 58s
build (windows-latest, Release, cl, 3.10)	3m 58s
build (windows-latest, Release, cl, 3.11)	4m 43s
build (windows-latest, Release, cl, 3.11)	4m 43s
build (windows-latest, Release, cl, 3.12)	4m 6s
build (windows-latest, Release, cl, 3.12)	4m 6s
build (macos-12, Release, clang, 3.10)	2m 47s
build (macos-12, Release, clang, 3.10)	2m 47s
build (macos-12, Release, clang, 3.11)	4m 31s
build (macos-12, Release, clang, 3.11)	4m 31s
build (macos-12, Release, clang, 3.12)	2m 45s
build (macos-12, Release, clang, 3.12)	2m 45s
build (macos-13, Release, clang, 3.10)	3m 7s
build (macos-13, Release, clang, 3.10)	3m 7s
build (macos-13, Release, clang, 3.11)	2m 56s
build (macos-13, Release, clang, 3.11)	2m 56s
build (macos-13, Release, clang, 3.12)	3m 0s
build (macos-13, Release, clang, 3.12)	3m 0s
build (macos-14, Release, clang, 3.10)	2m 2s
build (macos-14, Release, clang, 3.10)	2m 2s
build (macos-14, Release, clang, 3.11)	1m 36s
build (macos-14, Release, clang, 3.11)	1m 36s
build (macos-14, Release, clang, 3.12)	1m 39s
build (macos-14, Release, clang, 3.12)	1m 39s
	1h 45m 29s

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