BUG: User api version should take priority

[zbrookle]

Relates to #56

[codecov-io]

Codecov Report

Merging #60 (b1158a6) into master (96b9988) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #60   +/-   ##
=======================================
  Coverage   88.89%   88.89%           
=======================================
  Files          31       31           
  Lines        2189     2189           
  Branches       50       50           
=======================================
  Hits         1946     1946           
  Misses        234      234           
  Partials        9        9           

Impacted Files	Coverage Δ
avionix/kube/base_objects.py	96.87% <100.00%> (ø)

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