Bump kotlin_version from 1.4.21 to 1.4.30
Bump kotlin_version from 1.4.21 to 1.4.30

Bumps `kotlin_version` from 1.4.21 to 1.4.30.

Updates `kotlin-gradle-plugin` from 1.4.21 to 1.4.30
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/compare/v1.4.21...v1.4.30)

Updates `kotlin-stdlib-jdk7` from 1.4.21 to 1.4.30
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/compare/v1.4.21...v1.4.30)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
hannesa2/AndroidSlidingUpPanel,hannesa2/AndroidSlidingUpPanel