Fix the --version flag

[btschwertfeger]

The version flag was broken, since the package is named differently than the one that is imported.

[codecov]

Codecov Report

Attention: Patch coverage is 70.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 96.26%. Comparing base (4355695) to head (10c0c62).
Report is 17 commits behind head on master.

Files with missing lines	Patch %	Lines
cmethods/__init__.py	70.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #106      +/-   ##
==========================================
- Coverage   97.12%   96.26%   -0.87%     
==========================================
  Files           7        7              
  Lines         313      321       +8     
==========================================
+ Hits          304      309       +5     
- Misses          9       12       +3     

Flag	Coverage Δ
unittests	96.26% <70.00%> (-0.87%)	⬇️

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Files with missing lines	Coverage Δ
cmethods/__init__.py	92.00% <70.00%> (-5.62%)	⬇️