Sean Floyd

When searching on a single model, we can chain methods like `includes`. However this fails when searching across multiple models: ```ruby search = Elasticsearch::Model.search(query: {}, [ModelA, ModelB]) db_records = search.records.includes(:association)...

Allow chaining scope or includes when searching across multiple models

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## Why is this PR needed? Fixes #990 ## notes Must use `klass.name` instead of klass (#912)

SMS authentication is broken

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v2 authentication is being deprecated, and no longer works. v3 authentication requires gzipped content with the following mime-type: `application/x-google-protobuf`

`haml-lint` is crashing when loading our configuration file due the fact that we use a regular expression to exclude specific files for a rule, and happen to have upgraded to...