Update Gherkin-go to last version

[inluxc]

We need to update the gherkin-go library to the latest version v.9.0.0, so we can fix problems like #124, to add attachments to the step error messages.

[l3pp4rd]

Hi, integrating later gherkin version, would require protobuf dependency, in my opinion test related libraries should not have chains of dependencies.

Though, since I do not have time now to properly maintain this library, it may be considerable to move it to cucumber organization if there would be maintainers. they probably would instantly migrate it to recent gherkin version.

[l3pp4rd]

will speak to the cucumber organization about migration of the repository and handing over the main maintenance.

[lonnblad]

@l3pp4rd hey, did you get a chance to talk to them?
if you would want to, I can help you to maintain the repo otherwise

[l3pp4rd]

yes I've sent the email a month ago, but got no response yet, so probably it got lost or forgotten, will resend it again, and probably try other channels

[l3pp4rd]

got the response fast today, will be moving it to cucumber organization, it should receive more proper maintenance!

[lonnblad]

I was planning to take a stab at this and see if I can sort it out

[l3pp4rd]

may not be that simple, since there were changes in gherkin Rule added, the pretty formatter will change. though, would be best to find ways how to do it incrementally. maybe just supporting new lib and current gherkin features present. then next step after library is migrated, implement the new features, such as Rule keyword. Also later, based on other cucumber implementations, it seems to be better to compile gherkin Scenario outline to separate scenario list given all the examples in table. though, you could have a look at cucumber-js. but first just library migration, do not step into large refactorings because it will slow you down, do it incrementally.

[lonnblad]

yep, agree