Update plugin dokka to v1.8.20

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.jetbrains.dokka	1.8.10 -> 1.8.20

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Release Notes

Kotlin/dokka

v1.8.20: 1.8.20 Beta

Improvements

• Update Kotlin Gradle Plugin to 1.8.10 and Android Gradle Plugin to 4.1.3.
• Move the "Properties" block to be above functions inside the "Members" tab (#​2908)
• Make Javadoc tag parsing case-sensitive as per Javadoc specification (#​2907)
• Improve performance by reducing allocations and thus decreasing time spent in GC (#​2729)

Bugfixes

• Fix unresolved links leading to declarations from another source set #​2878
• Fix Dokka not failing the build if there are errors (#​2934), regression from 1.8.10. Thanks to @​jush!
• Fix TypeNotPresentException thrown in projects without KGP (#​2890), regression from 1.8.10.

Gradle plugin

• Start using kotlin-dsl plugin (#​2702, #​2833). Thanks to @​aSemy!
• Use Gradle filesystem types for task properties and apply default values lazily (#​2707, #​2983). Thanks to @​aSemy!

Plugin API

• Change the default logging level of console apps (DokkaConsoleLogger) to PROGRESS (#​2871)
• Introduce @InternalDokkaApi annotation (#​2904)
• Mark various utility API as Dokka-internal (#​2937)

Infrastructure

Big thanks to @​aSemy, @​Goooler and @​3flex for their valuable contributions and for improving the internal
developer experience when working on Dokka!

• Use convention plugins to configure the subprojects (#​2704 by @​aSemy)
• Use Gradle Version Catalog and type-safe project dependencies (#​2884 by @​aSemy)
• Migrate buildSrc to a composite build (#​2912 by @​Goooler)
• Tidy up build configurations and project files (#​2911, #​2930, #​2909, #​2946, #​2910, #​2705 by @​aSemy)
• Execute unit tests in parallel (#​2953 by @​Goooler)
• Add the ability to use different Java versions for build and test tasks (#​2918 by @​aSemy)
• Add reproducible archive build config (#​2947 by @​aSemy)
• Configure Kotlin compiler options lazily (#​2883 by @​Goooler)
• Improve GitHub Actions workflows (#​2939, #​2938 by @​Goooler)
• Stop testing on Java 15 as it has reached EOL (#​2892 by @​3flex)
• Remove a workaround for a fixed Gradle issue (#​2891 by @​3flex)

Documentation

• Add informational badges to the main README.md (#​2940). Thanks to @​Goooler!
• Fix typos, inconsistencies and incorrect links in documentation (#​2979, #​2973, #​2952). Thanks to @​LiYing2010, @​strangesource and @​ansman!
• Add more information about the infrastructure to CONTRIBUTING.md (#​2952)

Security

• Bump npm dependencies to address various vulnerabilities (#​2894, #​2923)

Other

• Update publication POM links to https (#​2931). Thanks to @​aSemy!
• Tidy up Gradle example projects and warning suppressions (#​2916, #​2975). Thanks to @​aSemy!

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