Bump kotlin_version from 1.3.72 to 1.4.0 (#255)
Bump kotlin_version from 1.3.72 to 1.4.0 (#255)

Bumps `kotlin_version` from 1.3.72 to 1.4.0.

Updates `kotlin-gradle-plugin` 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)

Updates `kotlin-stdlib-jdk7` 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>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
jraska/github-client