Specify supported njs version.

[hongzhidao]

https://unit.nginx.org/scripting/

Warning

Unit 1.31+ doesn’t support pre-0.8 njs [versions](https://nginx.org/en/docs/njs/changes.html); please update.

Because of the change of njs 0.8.2, Unit doesn't support this version, it looks like we need to specify which versions we support.

[Dean-Coakley]

@hongzhidao I'd be happy to help out with this issue.

Would updating Unit 1.31+ doesn’t support pre-0.8 njs -> Unit 1.31+ doesn’t support pre-0.8.2 njs resolve the issue? Or can you help me understand the change you'd like to see?

[hongzhidao]

Hi @Dean-Coakley
Thanks. Actually, 0.8.0-0.8.2 works.
@thresheek could you help check it?

[JTorreG]

the current wording is

Unit 1.32.0 and later require [njs 0.8.2](https://nginx.org/en/docs/njs/changes.html).

Does this need to be updated or can this issue we closed?

cc @hongzhidao @thresheek @callahad