Update docs and dev dependencies

[codecov[bot]]

Codecov Report

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

Project coverage is 94.99%. Comparing base (0ef55c1) to head (69a7d78). Report is 1 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #636 +/- ## ======================================= Coverage 94.99% 94.99% ======================================= Files 81 81 Lines 2976 2976 ======================================= Hits 2827 2827 Misses 149 149 ``` | [Flag](https://app.codecov.io/gh/Terralego/TerraVisu/pull/636/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Terralego) | Coverage Δ | | |---|---|---| | [backend-unittests](https://app.codecov.io/gh/Terralego/TerraVisu/pull/636/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Terralego) | `94.99% <ø> (ø)` | | 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=Terralego#carryforward-flags-in-the-pull-request-comment) to find out more.

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