Fix deprecation warnings

[znicholls]

Pull request

Couple of quick fixes to stop deprecation warnings spewing out when using scmdata.

Please confirm that this pull request has done the following:

• [ ] ~Tests added~
• [ ] ~Documentation added (where applicable)~
• [ ] ~Example added (either to an existing notebook or as a new notebook, where applicable)~
• [x] Changelog in '/changelog' added

[codecov[bot]]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (3b61470) 95.15% compared to head (8643ec3) 95.16%. Report is 4 commits behind head on master.

:exclamation: Current head 8643ec3 differs from pull request most recent head ea5bcb5. Consider uploading reports for the commit ea5bcb5 to get more accurate results

Files	Patch %	Lines
src/scmdata/run.py	87.50%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #298 +/- ## ======================================= Coverage 95.15% 95.16% ======================================= Files 24 24 Lines 2190 2109 -81 Branches 404 379 -25 ======================================= - Hits 2084 2007 -77 + Misses 86 85 -1 + Partials 20 17 -3 ```

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[lewisjared]

Nice. Do we need to bump the minimum version of seaborn to what ever major release added the errorbar parameter?

[znicholls]

Do we need to bump the minimum version of seaborn to what ever major release added the errorbar parameter?

True, thanks