[Feature] Elasticsearch 7

[jkabat]

Any plan to support ruflin/Elastica:^7 any time soon?

[jkabat]

@sstok maybe I could help with this one - do you have any sidenotes which could speed up the process?

[sstok]

I haven't used Elasticsearch myself, I know @dkarlovi did most of the work on this integration. Maybe he can provide some help.

[dkarlovi]

@jkabat please feel free to contribute any fixes and features, I haven't really used this library actively since we last spoke in #268. 👍 Thanks!

[jkabat]

@sstok @dkarlovi my preliminary tests show that by allowing ruflin/Elastica:^7.0 everything works as supposed to.

You are even doing tests using that package and elasticasearch v7:
https://github.com/rollerworks/search/blob/v2.0.0-BETA2/composer.json#L53
https://github.com/rollerworks/search/blob/v2.0.0-BETA2/.github/workflows/ci.yaml#L48

It is just not allowed for the single package:
https://github.com/rollerworks/search-elasticsearch/blob/v2.0.0-BETA2/composer.json#L26

Right now Im using my fork and testing my implementation against v7. Ill provide feedback and fixes if necessary.
Thanks again for the hard work on this library.