support async bulk api

[RainJayTsai]

feature async bulk api

[codecov[bot]]

Codecov Report

Merging #90 into master will increase coverage by 0.2%. The diff coverage is 98.79%.

@@           Coverage Diff            @@
##           master     #90     +/-   ##
========================================
+ Coverage    97.5%   97.7%   +0.2%     
========================================
  Files           7       7             
  Lines         440     522     +82     
  Branches       78      94     +16     
========================================
+ Hits          429     510     +81     
  Misses          7       7             
- Partials        4       5      +1

Impacted Files	Coverage Δ
aioelasticsearch/helpers.py	98.78% <98.79%> (-0.01%)	:arrow_down:

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[hellysmile]

Thanks for the contribution! Can You add some tests?

[hellysmile]

This project still support Python 3.5.3-, can You pass everywhere explicit loop?

[RainJayTsai]

Ok, I am refactoring

[janLo]

I stumbled upon this because I need bulk in a asyncio project. What is the current status of this PR? Is there a particular reason why it was never merged?

[Ronserruya]

^^ Bulk is a really critical part of working with ES, any estimate for this?

[CLAassistant]

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