Version conflict with fluent-plugin-elasticsearch

[max0ne]

Hi,
I'd like to use fluent-plugin-google-cloud together with fluent-plugin-elasticsearch, however I'm running into a version conflict between:

• fluent-plugin-google-cloud@0.10.4 > googleauth = 0.9.0 > faraday ~> 0.12
• fluent-plugin-elasticsearch@4.2.1 > elasticsearch@7.10.0 > elasticsearch-transport = 7.10.0 > faraday ~> 1

The solution here should be update dependency of googleauth one of the later versions, any versions later than 0.11.0 uses faraday >= 0.17.3, < 2.0 which should work with elasticsearch plugin.

I can make a PR to fix this, but want to make sure if there's any cadence to version updates, anything I need to watch out for?

[igorpeshansky]

This should work after #504.