Merge branch 'develop'

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (4b6b7f4) 80.76% compared to head (13f2d6e) 80.04%. Report is 4 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #183 +/- ## ========================================== - Coverage 80.76% 80.04% -0.72% ========================================== Files 63 63 Lines 4917 4917 ========================================== - Hits 3971 3936 -35 - Misses 946 981 +35 ``` | [Flag](https://app.codecov.io/gh/ncbo/ontologies_linked_data/pull/183/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ncbo) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/ncbo/ontologies_linked_data/pull/183/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ncbo) | `80.04% <100.00%> (-0.72%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ncbo#carryforward-flags-in-the-pull-request-comment) to find out more.

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