CodeActionLiteralSupport and versioning error

[kathrynkodama]

Description:
Add CodeActionLiteralSupport for quick-fixes in the LanguageServerWrapper:

textDocumentClientCapabilities.getCodeAction().setCodeActionLiteralSupport(new CodeActionLiteralSupportCapabilities(Arrays.asList(new String[] {CodeActionKind.QuickFix}));

I also notice an error in the versioning where I continue to see this error when selecting a code action:
Edit version %d is older than current version %d from the EditorEventManager. I believe this is due to the versions being updated out of sync in the documentChanged method of DocumentEventManager. The VersionedTextDocument is always one version behind the version in DocumentEventManager. Altering the code to the below fixes this error:

changesParams.getTextDocument().setVersion(++version);

Suggested Labels:
bug, enhancement

Suggested Assignees:

Affected Product Version:
Using the latest version from the master branch

OS, DB, other environment details and versions:
Mac, IntelliJ IDEA Community Edition 2020.3

Steps to reproduce:

1. Enable quick-fix code action literal support in lsp4intellij
2. Attempt a quick-fix
3. Notice that the code action is not applied because and see the versioning error

Related Issues:

[Trias]

I agree it should be a precrement. It's interesting that apparently has never caused any problems before.

Would you mind sending a Pull Request? :)

[kathrynkodama]

Thank you @Trias, see the linked PR