no issue
Output serializer's url util was expecting `og_image` and `twitter_image` to be top-level attributes in the `attrs` object but they are actually nested under `posts_meta`.
- updated the code to use lodash's `get/set()` so that we can work with paths for easier handling of nested objects
- fixed unit tests where the mocked data under test did not match real-world data
- move all test files from core/test to test/
- updated all imports and other references
- all code inside of core/ is then application code
- tests are correctly at the root level
- consistent with other repos/projects
Co-authored-by: Kevin Ansfield <kevin@lookingsideways.co.uk>
