Merge pull request #61 from hanazuki/ntop-bytesize #94

Job	Run time
ruby-versions / Generate Ruby versions	1s
build (2.3 / ubuntu-latest)	23s
build (2.3 / macos-latest)	55s
build (2.4 / ubuntu-latest)	20s
build (2.4 / macos-latest)	46s
build (2.5 / ubuntu-latest)	21s
build (2.5 / macos-latest)	46s
build (2.6 / ubuntu-latest)	21s
build (2.6 / macos-latest)	47s
build (2.7 / ubuntu-latest)	22s
build (2.7 / macos-latest)	45s
build (3.0 / ubuntu-latest)	6s
build (3.0 / macos-latest)	11s
build (3.1 / ubuntu-latest)	6s
build (3.1 / macos-latest)	12s
build (3.2 / ubuntu-latest)	9s
build (3.2 / macos-latest)	12s
build (head / ubuntu-latest)	5s
build (head / macos-latest)	11s
build (jruby / ubuntu-latest)	37s
build (jruby / macos-latest)	33s
build (jruby-head / ubuntu-latest)	32s
build (jruby-head / macos-latest)	36s
build (truffleruby / ubuntu-latest)	22s
build (truffleruby / macos-latest)	50s
build (truffleruby-head / ubuntu-latest)	22s
build (truffleruby-head / macos-latest)	49s
	11m 40s

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