[Doc][TestNG][v2] Missing allure-testng artefact.

[L-Evg]

The documentation on Allure2-TestNG integration (https://allure-framework.github.io/allure-docs/2.0/#_testng) advises to use io.qameta.allure.allure-testng as a dependency.
I was not able to get the artefact upon, looks corresponding code is missing in https://github.com/allure-framework/allure2
Expected results: the instruction refers to available artefacts and/or there are steps on how-to get all dependencies (including snapshots).

[sskorol]

@L-Evg as you may noticed, there's a SNAPSHOT version used in docs. It usually means that it's not published yet. So if you wanna use this new adaptor, you may want to build it manually from sources, or just wait for release. Not really sure, if SNAPSHOTs are currently available in public repositories. @baev could you confirm?

[L-Evg]

@sskorol - thank you, I noticed that. As I stated in the description I have not managed to find that source code in Git repo. Probably it is somewhere around, simply had bad luck with the looking-up.

[sskorol]

@L-Evg check https://github.com/allure-framework/allure-java

[L-Evg]

Thank you!