Release 1.6.0
This release includes:
* Improved DB API testing
* DB API Changes
* A new option to include run uuid in the return from
get_test_runs_by_status_for_run_ids()
* Making datetime the default type for get_test_counts_in_date_range(), the
previous str type will still work but has been deprecated.
* Fixes get_ids_for_all_tests() which previously only returned a single id
* A new optional start_date parameter on all get_recent*() methods