Add changelog entries for v0.39

[codecov[bot]]

Codecov Report

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

Project coverage is 100.00%. Comparing base (cd19f18) to head (e0c38ed). Report is 1 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #595 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 9 9 Lines 868 868 ========================================= Hits 868 868 ```

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