Bump versions.kotlin from 1.5.21 to 1.5.30 (#228)

Bumps `versions.kotlin` from 1.5.21 to 1.5.30.

Updates `kotlin-stdlib` from 1.5.21 to 1.5.30
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.5.21...v1.5.30)

Updates `kotlin-test-junit` from 1.5.21 to 1.5.30
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.5.21...v1.5.30)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-test-junit
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle

@@ -25,7 +25,7 @@ buildscript {
     }
 
     ext.versions = [
-            kotlin: '1.5.21',
+            kotlin: '1.5.30',
             coroutines: '1.5.1',
             slf4j: '1.7.32',
             lazysodium: '5.0.1',