Upgrade Kotlin to `1.7.10` and Gradle to `6.9.4` #3

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Run time

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Job	Run time
Gradle Wrapper	4s
Check for Scala 2.11	6m 6s
Check for Scala 2.12	5m 49s
Check for Scala 2.13	6m 20s
Finish / Ready To Merge	1s
	18m 20s