Bump kotlin_version from 1.3.72 to 1.4.0
Bump kotlin_version from 1.3.72 to 1.4.0

Bumps `kotlin_version` from 1.3.72 to 1.4.0.

Updates `kotlin-gradle-plugin` from 1.3.72 to 1.4.0

Updates `kotlin-stdlib` from 1.3.72 to 1.4.0
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v1.4.0/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/compare/v1.3.72...v1.4.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
pyamsoft/home-button