Bump kotlin.version from 1.7.20 to 1.7.21

Bumps `kotlin.version` from 1.7.20 to 1.7.21.

Updates `kotlin-stdlib` from 1.7.20 to 1.7.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/commits)

Updates `kotlin-stdlib-jdk8` from 1.7.20 to 1.7.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/commits)

Updates `kotlin-test-junit` from 1.7.20 to 1.7.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/commits)

Updates `kotlin-maven-plugin` from 1.7.20 to 1.7.21

Updates `kotlin-reflect` from 1.7.20 to 1.7.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/commits)

---
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-stdlib-jdk8
  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
- dependency-name: org.jetbrains.kotlin:kotlin-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-reflect
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

bom/pom.xml

@@ -39,7 +39,7 @@
         <dagger.version>2.44</dagger.version>
         <jackson.version>2.13.4.2</jackson.version>
 
-        <kotlin.version>1.7.20</kotlin.version>
+        <kotlin.version>1.7.21</kotlin.version>
         <junit.jupiter.version>5.9.1</junit.jupiter.version>
         <junit.pioneer.version>1.8.0</junit.pioneer.version>
         <truth.version>1.1.3</truth.version>