Heads up for Matplotlib 3.7 deprecation

[oscargus]

This is a heads up that Matplotlib 3.7 will deprecate the use of tunit_edges, so there will be a deprecation warning here: https://github.com/joferkington/mpldatacursor/blob/2df44a3912c2684b2d66fadc7cacbb9f60a15186/mpldatacursor/pick_info.py#L295

The solution is to simply copy the code.

[erwanp]

Having other Matplotlib 3.7 related problems here

File "[...]/site-packages/mpldatacursor/datacursor.py", line 444, in annotate
    ax.figure.texts.append(ax.texts.pop())
AttributeError: 'ArtistList' object has no attribute 'pop'

with Matplotlib 3.7.1

@joferkington are you still using the package?