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:

mpldatacursor/mpldatacursor/pick_info.py

Line 295 in 2df44a3

edges = ax.tunit_edges()

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?