Meltano

<https://github.com/meltano/sdk/pull/3413|#3413 test: Explicitly test flattening of combined (oneOf, anyOf, allOf) schemas>
Pull request opened by <https://github.com/edgarrmondragon|edgarrmondragon>
## Summary by Sourcery

Tests:

• Add a regression test ensuring flatten_schema correctly flattens schemas using oneOf, anyOf, and allOf combinations.
<https://github.com/meltano/sdk|meltano/sdk>

<https://github.com/meltano/sdk/pull/3413|#3413 test: Explicitly test flattening of combined (oneOf, anyOf, allOf) schemas>
Pull request ready for review by <https://github.com/edgarrmondragon|edgarrmondragon>
<https://github.com/meltano/sdk|meltano/sdk>

<https://github.com/meltano/sdk/pull/3413|#3413 test: Explicitly test flattening of combined (oneOf, anyOf, allOf) schemas>
Pull request merged by <https://github.com/edgarrmondragon|edgarrmondragon>
<https://github.com/meltano/sdk|meltano/sdk>