Fix bars in distribution plot

[frankenjoe]

Closes #34

This fixes the problem of inconsistent bars, but has the downside that we replace the frequency count with density. So maybe we should add an option to switch between the two solutions?

[codecov]

Codecov Report

Merging #35 (8ba84d2) into master (c30e449) will not change coverage.
The diff coverage is 100.0%.

Impacted Files	Coverage Δ
audplot/core/api.py	100.0% <100.0%> (ø)

[hagenw]

If you would like to have an option to switch what to show on the y-axis, I see two options:

Use frequency as the other option instead of count as this has not the problems you have shown in #34 (comment)

Another solution would be to provide the count option, but also disable the common_bins and kde_kws settings then (basically use what we had before this pull request for this option).

But I would also not over complicate it here and would prefer to have just one option. count is anyway not absolute as it depends on the bin width. density is easy to interpret, but you cannot easily see if one database has more samples than another. frequency is not so easy to understand, but you can see differences between the actual number of samples in the database.

So, I think I would stay with density or maybe go with frequency.

[frankenjoe]

So, I think I would stay with density or maybe go with frequency.

I have no strong opinion, what is your preference?

[hagenw]

I think frequency shows slightly more information, so maybe we switch to frequency.

[frankenjoe]

I think frequency shows slightly more information, so maybe we switch to frequency.

done