Bump dokka.version from 1.7.20 to 1.9.0 (#27)

Bumps `dokka.version` from 1.7.20 to 1.9.0.

Updates `org.jetbrains.dokka:dokka-maven-plugin` from 1.7.20 to 1.9.0
- [Release notes](https://github.com/Kotlin/dokka/releases)
- [Commits](Kotlin/dokka@v1.7.20...v1.9.0)

Updates `org.jetbrains.dokka:kotlin-as-java-plugin` from 1.7.20 to 1.9.0
- [Release notes](https://github.com/Kotlin/dokka/releases)
- [Commits](Kotlin/dokka@v1.7.20...v1.9.0)

---
updated-dependencies:
- dependency-name: org.jetbrains.dokka:dokka-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.jetbrains.dokka:kotlin-as-java-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Andrey Shcheglov <andrewbass+saveourtool@gmail.com>

pom.xml

@@ -17,7 +17,7 @@
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 		<kotlin.version>1.9.10</kotlin.version>
-		<dokka.version>1.7.20</dokka.version>
+		<dokka.version>1.9.0</dokka.version>
 		<spring.version>[4.2.9, 4.3)</spring.version>
 	</properties>