Update scalebar.py

[ilopata1]

Formalizes the changes suggested by altanir84 in https://github.com/ppinard/matplotlib-scalebar/issues/39 to add support for bbox_to_anchor Additionally implements get_window_extent

[ppinard]

Thank you @ilopata1 for the PR and my apologies I forgot that there was a pending PR. Some comments above.

[codecov-commenter]

Codecov Report

Merging #40 (43eac39) into master (4e4dfd0) will increase coverage by 0.24%. The diff coverage is 100.00%.

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@@            Coverage Diff             @@
##           master      #40      +/-   ##
==========================================
+ Coverage   91.21%   91.46%   +0.24%     
==========================================
  Files           3        3              
  Lines         410      422      +12     
==========================================
+ Hits          374      386      +12     
  Misses         36       36              

Impacted Files	Coverage Δ
matplotlib_scalebar/scalebar.py	91.96% <100.00%> (+0.29%)	:arrow_up:

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[trisreed]

I've manually edited scalebar.py so I can get this functionality in the current release. Is there an ETA as to when this will be merged and available via pip? I note the issue was first reported in 2021.