Intellij D Language plugin 1.28.6 and 1.29.1

[singingbush]

The latest changes for the Intellij plugin are now available in 
the [Jetbrains 
Marketplace](https://plugins.jetbrains.com/plugin/8115). 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!