[Update]: Bump kotlinVersion from 1.5.31 to 1.6.10

Bumps `kotlinVersion` from 1.5.31 to 1.6.10.

Updates `kotlin-gradle-plugin` from 1.5.31 to 1.6.10
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.5.31...v1.6.10)

Updates `kotlin-serialization` from 1.5.31 to 1.6.10
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.5.31...v1.6.10)

Updates `kotlin-stdlib` from 1.5.31 to 1.6.10
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.5.31...v1.6.10)

Updates `kotlin-reflect` from 1.5.31 to 1.6.10
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.5.31...v1.6.10)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-gradle-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.jetbrains.kotlin:kotlin-serialization
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.jetbrains.kotlin:kotlin-reflect
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

dependencies.gradle

@@ -1,6 +1,6 @@
 ext {
     // Kotlin
-    kotlinVersion = '1.5.31'
+    kotlinVersion = '1.6.10'
     ktorVersion = '1.6.7'
 
     // Coroutines