added vertices function

[larsbuntemeyer]

No description provided.

[codecov-commenter]

Codecov Report

Merging #30 (1c0f97c) into master (2e35678) will increase coverage by 2.50%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #30      +/-   ##
==========================================
+ Coverage   71.14%   73.65%   +2.50%     
==========================================
  Files          16       16              
  Lines         357      391      +34     
==========================================
+ Hits          254      288      +34     
  Misses        103      103              

Flag	Coverage Δ
unittests	73.65% <100.00%> (+2.50%)	⬆️

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Impacted Files	Coverage Δ
cordex/cmor/__init__.py	100.00% <ø> (ø)
cordex/cmor/utils.py	90.47% <100.00%> (+4.51%)	⬆️
cordex/core/domain.py	80.50% <100.00%> (+1.22%)	⬆️
cordex/tables/__init__.py	93.33% <100.00%> (ø)

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[larsbuntemeyer]

implements #14