Use an enum for result status.

[brasmusson]

Summary

Instead of using string constants, use an enum for the result status
(passed, failed, ...).

Motivation and Context

Based on a review comment on the upgrade to a newer Gherkin version, that pointed to the problem of using string constants for result status (the result class in Gherkin2 did not have a string constant for the pending status, making matter more complicated), I have introduced an enum in the Result class for the possible result statuses

How Has This Been Tested?

The test suites has been updated and amended to, so it covers the change from strings to enum constants for result statuses.

Types of changes

• Bug fix (non-breaking change which fixes an issue).
• New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to not work as expected).

Checklist:

• I've added tests for my code.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.