Upgraded dependencies; AbstractPlotting -> Makie

[jagot]

• Bumped compat bounds
• Transitioned from AbstractPlotting (deprecated) to Makie; to avoid forcing the rather large dependency on users, the Makie plotting recipes are in a package extension.
• Dropped Julia < 1.9, since that is when package extensions were introduced
• Test plotting recipes on CI (just that they do not crash, no actual tests of the output)
• Bumped version 0.2.1 -> 0.2.2, but maybe we want to go to 0.3.0?

I did not make the plot recipes interactive (as discussed here), but if it is interesting, that could be done in a later PR.

[codecov-commenter]

Codecov Report

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

Project coverage is 95.69%. Comparing base (dc5979b) to head (4405394).

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #21 +/- ## =========================================== + Coverage 65.06% 95.69% +30.63% =========================================== Files 1 2 +1 Lines 83 93 +10 =========================================== + Hits 54 89 +35 + Misses 29 4 -25 ```

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