[Fix #115] Support elasticsearch-dsl > 6.1.0

[safwanrahman]

This does not work!
Its something like verification purpose. The test are not passing!
need documentation fix and others.
Do not try this still!

this fixes #115

[sabricot]

Thank you @safwanrahman for your contribution i didn't have yet looked at it, but i promise i will soon.

[safwanrahman]

@kornikopic Thanks for going through the changes. I have been working on this PR and still not finished.
I will remove the debugging codes when I finish the PR, but for debugging purpose, its necessary actually.

[safwanrahman]

This PR depends on elastic/elasticsearch-dsl-py#1099

[safwanrahman]

After all, it passed all the tests and working perfectly! 💯
Now needs couple of cleanup and a rebase and it will be ready for review! 🚀
Moreover, need some documentation also!

@sabricot can you take a look into it?

[SeguinBe]

Is this going to be merged eventually?

[safwanrahman]

Is this going to be merged eventually?

@SeguinBe This was blocked for elastic/elasticsearch-dsl-py#1099. As the blocking PR has been merged recently, I think we can merge this PR soon.
Anyone is up there for reviewing the PR? @sabricot will you have some time?

[safwanrahman]

I can not find any people to review this PR. So going to merge it!