Add RecursiveArrayTools v3 compat

[codecov[bot]]

Codecov Report

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

Comparison is base (efc8010) 99.96% compared to head (34c28f5) 99.96%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #176 +/- ## ======================================= Coverage 99.96% 99.96% ======================================= Files 26 26 Lines 3087 3087 ======================================= Hits 3086 3086 Misses 1 1 ```

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[kellertuer]

Looks good to me besides the Changelog entry :)