Prepare for 0.9 release

[codecov[bot]]

Codecov Report

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

Project coverage is 70.84%. Comparing base (a28395e) to head (9efadb5). Report is 3 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #45 +/- ## ======================================= Coverage 70.84% 70.84% ======================================= Files 9 9 Lines 559 559 ======================================= Hits 396 396 Misses 163 163 ```

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