Merge pull request #897 from komamitsu/dependabot/gradle/org.slf4j-sl… #980

Job	Run time
integration_ext_test (16)	1m 50s
prepare_for_integration_test	3m 22s
build (8)	10m 53s
integration_ext_test (17)	1m 54s
build_ext (16)	3m 30s
build (11)	11m 1s
build_ext (17)	1m 15s
integration_test (8)	8s
integration_test (11)	6s
integration_test (17)	8s
	34m 7s

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