Bump kotlin_version from 1.5.21 to 1.5.30

Bumps `kotlin_version` from 1.5.21 to 1.5.30.

Updates `kotlin-gradle-plugin` 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-scripting-compiler` 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-compiler-embeddable` 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-annotation-processing-embeddable` 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-gradle-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-scripting-compiler
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-compiler-embeddable
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-annotation-processing-embeddable
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

build.gradle

@@ -1,5 +1,5 @@
 buildscript {
-    ext.kotlin_version = '1.5.21'
+    ext.kotlin_version = '1.5.30'
 
     repositories {
         mavenCentral()