Update (dev-)requirements.txt

[LenaWil]

I had some problems getting this to run, and they went away when I ran pip-compile on both files and then installed the requirements again.

Whether or not those are related, I don’t know, but it can’t hurt to run it.

I didn’t use the upgrade flag.

[codecov[bot]]

Codecov Report

Base: 56.66% // Head: 56.65% // Decreases project coverage by -0.00% :warning:

Coverage data is based on head (024191a) compared to base (18b6589). Patch has no changes to coverable lines.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #221 +/- ## ========================================== - Coverage 56.66% 56.65% -0.01% ========================================== Files 48 48 Lines 2342 2344 +2 Branches 280 280 ========================================== + Hits 1327 1328 +1 - Misses 986 987 +1 Partials 29 29 ``` | Flag | Coverage Δ | | |---|---|---| | unittests | `56.65% <ø> (-0.01%)` | :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=Dutcher#carryforward-flags-in-the-pull-request-comment) to find out more. | [Impacted Files](https://codecov.io/gh/DutcherNL/Scala-Dining-WebApp/pull/221?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Dutcher) | Coverage Δ | | |---|---|---| | [dining/views.py](https://codecov.io/gh/DutcherNL/Scala-Dining-WebApp/pull/221/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Dutcher#diff-ZGluaW5nL3ZpZXdzLnB5) | `23.59% <0.00%> (-0.07%)` | :arrow_down: | | [dining/models.py](https://codecov.io/gh/DutcherNL/Scala-Dining-WebApp/pull/221/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Dutcher#diff-ZGluaW5nL21vZGVscy5weQ==) | `72.60% <0.00%> (+0.18%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Dutcher). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Dutcher)

:umbrella: View full report at Codecov.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.

[mhvis]

Thanks!

@DutcherNL I'll leave merging to you.