VIS: don't modify matplotlib units registry globally

[jorisvandenbossche]

Possible follow-up for #18307, see comment there: #18307 (comment) and #18307 (comment) for the details.

Idea would be to only register our converters when we are plotting ourselves, so people plotting directly with matplotlib (plt.plot(..) or ax.plot(..) don't use our converters by default (they can still register them manually with the option).

[TomAugspurger]

Pushing to 0.24.

[jreback]

@TomAugspurger is this doable with the latest mpl release?

[TomAugspurger]

I'm not sure. I don't think it's a blocker for 0.24.0 though.

[TomAugspurger]

Pushing to 0.25

[jorisvandenbossche]

Leaving for after 0.25? (1.0)