Unable to parse definitions with the named capturing groups

[marinaglancy]

Describe the bug
I tried to use this extension on Moodle features.
Moodle uses named capturing groups in the majority of step definitions.

To Reproduce
Steps to reproduce the behavior:

1. Clone Moodle and open in vscode https://github.com/moodle/moodle
2. Configure "cucumberautocomplete.steps": ["**/behat_*.php"]
3. Open any .feature file
4. You will see a lot of steps highlighted as errors "Was unable to find step ..."

Screenshots

Cucumberautocomplete part of VSCode settings:

{
  "cucumberautocomplete.steps": [
      "**/behat_*.php"
  ],
}

Step definition:
Here is an example of the step definition that can not be processed
https://github.com/moodle/moodle/blob/master/auth/tests/behat/behat_auth.php#L44

@Given /^I log in as "(?P<username_string>(?:[^"]|\\")*)"$/

If I remove the named capturing group, the extension can parse it:

@Given /^I log in as "(?:[^"]|\\")*"$/

This is not the only problem with parsing steps in Moodle, I noticed that some other steps are also reported as missing. Also often "Go to definition" brings to a random place in behat definitions files. But I think this error is the most prominent one