Fix Analyze Groovy files in folder which was always available resulting
in failures dependent on the context it was used.

It is now only available from a explorer folder.

Also correct the name of the parameter passed so explorer folder
requests work.

Fixes nvuillam#177

Fix fixes in files which still have remaining issues not applying due to
the change in behaviour of npm-groovy-lint status code handling in
11.0.0 by now requesting failon: none.

Add more debugging so that its easier to understand what is happening.

Default debugging setting to that the DEBUG environment if set so that
the developer doesn't have to set it manually in settings when running a
debug session.

Also enable npm-groovy-lint debugging which is key to understanding
issues. While this was previous set for debugging sessions in the
environment the setting would always override it.

Fix all the CI linting errors and update modules to address
vulnerabilities.

Update all client and server dependencies to eliminate security issues.

Refactor tests to be more reliable, making them independent
of each other, so if one test fails others are not effected. This
includes self managing timeouts as mocha doesn't handle pending
promises, which makes it harder to debug issues.

Run and Debug commands:
* Fix path to workspace files of "Language Server E2E Test" Run
  and Debug command.
* Rename to make it clear what each config is used for.

Add mochaExplorer configuration, to improve test visibility.

Re-enable big groovy test file, now it works as expected.

Rename test files to eliminate stuttering.

Fix test debugging by using NPM_DEBUG instead of DEBUG env var
which is filtered out by vscode, see:
microsoft/vscode#197494.

Remove duplicate lint call that's now handled by onDidChangeContent.

Remove fixed delay comment so we don't have to update when the delay
changes.

Update Node and JVM versions in README.md.

Update all packages, to address security issues and bring in
the latest version of npm-groovy-lint which includes a critical
race condition fix.

Clean up imports.

Use onDidChangeContent to trigger re-linting to improve
performance and remove skipNextOnDidChangeContents which
conflicts with this change.

Eliminate else statements where previous block returns,
to improve code readability.

Refactor resetDiagnostics into deleteDiagnostics as its now
only used for the delete flow, so we can remove unnecessary
logic and diagnostic changes.

Remove commented out code.

Convert high noise debugging to trace.

Add missing await to docManager.updateDocumentSettings call

Use latest xvfb-action@v1 instead of v1.0 to bring in the latest
fixes.