V6 fix extension

[stity]

Main goal:

• Make v6 functional in vscode extension

Change summary:

• update dependencies for extension
  • vscode language v9
  • betterer v6
• use await client.start(); instead of client.start();await client.onReady();
• use new runner everytime (I was seeing some cache issues sometimes for already processed files, it would erase all the issues of the files)
• introduce new CI option for the extension to avoid overwritting the result file
• fix error in path normalization to make the extension work in windows
• fix source maps for debugging extension in vscode
• fix import path
• disabled the tests because I didn't fix it.

It's not perfect but it can help for the release of the v6.

[stity]

Also, it could be a good idea to include some instructions in your readme to help new developers build the source code.

[phenomnomnominal]

Thanks for this, I will try to check it out properly soon!