Feature: Union schema compatibility

[fivetran-catfritz]

Issue:

• [Feature] Support for running with multiple Apple/Google Store connectors dbt_app_reporting#20
• [Feature] Update collect_freshness config in src_google_play.yml to account for dbt macro logic #13

Confirm the following files were correctly updated automatically:

• CHANGELOG
• README
• stg_google_play.yml, src_google_play.yml
• docs.md
• joins
• window functions (partition by)
• 'source_relation' column added in stagingmodels
• tests

Manual updates:

• Add source_relation if necessary
• Finish any incomplete/incorrect joins/partitions
• Update tests to include source_relation in unique-combination-of-cols if necessary
  • May need to remove some uniqueness tests in favor of the combo test

Validation:

• Spot check with seed data, unioning is functioning as expected.

  • 

• Also:

  • see internal ticket

[fivetran-joemarkiewicz]

@fivetran-catfritz this PR is looking good, just a few small requests.

[fivetran-joemarkiewicz]

Also before merging we should add the auto releaser to this package.

[fivetran-catfritz]

@fivetran-joemarkiewicz I have updated, including the changes from apple_store. This is ready for re-review!

[fivetran-joemarkiewicz]

LGTM thanks for applying the updates!