Add galgebra.__version__ for easy version inspection

[eric-wieser]

This uses the same approach as clifford and pyganja

[codecov]

Codecov Report

Merging #172 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #172      +/-   ##
==========================================
+ Coverage   67.74%   67.76%   +0.01%     
==========================================
  Files           8        9       +1     
  Lines        4682     4684       +2     
==========================================
+ Hits         3172     3174       +2     
  Misses       1510     1510

Impacted Files	Coverage Δ
galgebra/__init__.py	100% <100%> (ø)	⬆️
galgebra/_version.py	100% <100%> (ø)

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[utensil]

Can you change the sphinx conf too? Discussed in #9 (comment) .

[eric-wieser]

I couldn't find a version number in conf.py, otherwise I would have

[eric-wieser]

I think your releases plugin is doing something magic there

[utensil]

Oh, seems I have deleted the version line from sphinx conf sometime around introducing release. It's funny how my memory works. Looking for a closure without remembering the closure.

[eric-wieser]

Indeed, was removed in de366f8

[utensil]

Neat!