The latest changes for the Intellij plugin are now available in the Jetbrains Marketplace. It can be installed directly in Intellij IDEA via the plugins section of the settings menu.
version 1.28.6 supports Intellij IDEA 2022.1 - 2022.2.*
version 1.29.1 supports Intellij IDEA 2022.3.*
There's been a surge in development recently and thanks to the hard work of Etienne Brateau it now provides schema validation for dub.json files as well as syntax highlighting for dub.sdl files.
Other improvements are in development and should be available in the next few weeks. There's still a lot that needs doing and a bunch of bugs that need fixing, not to mention documentation that needs updating.
If you are an Intellij user please take the time to install/update the plugin and give it a whirl. Please report any errors to the github project here: https://github.com/intellij-dlanguage/intellij-dlanguage/ or even better, get involved and make a PR!