Merge pull request #192 from cybozu-go/dependabot/go_modules/golang.o… #888

Job	Run time
build (3Mi, change-to-standalone)	22m 40s
build (3Mi, change-to-secondary)	27m 11s
build (3Mi, change-to-primary)	27m 37s
build (3Mi, !//)	37m 16s
build (3Mi, backup-failure)	30m 21s
build (3Mi, incr-backup)	30m 25s
build (10Mi, various-transfer-part-size)	22m 41s
build (200Gi, various-transfer-part-size)	21m 38s
build (3Mi, full-backup)	29m 4s
	4h 8m 53s

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