Add full core testing coverage

[zbrookle]

No description provided.

[codecov-commenter]

Codecov Report

Merging #42 into master will increase coverage by 0.27%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #42      +/-   ##
==========================================
+ Coverage   88.75%   89.02%   +0.27%     
==========================================
  Files          30       31       +1     
  Lines        2169     2178       +9     
  Branches       43       44       +1     
==========================================
+ Hits         1925     1939      +14     
+ Misses        237      231       -6     
- Partials        7        8       +1     

Impacted Files	Coverage Δ
avionix/kube/core.py	79.78% <ø> (+0.53%)	⬆️
avionix/chart/chart_builder.py	96.40% <0.00%> (-0.59%)	⬇️
avionix/chart/chart_dependency.py	100.00% <0.00%> (ø)
avionix/chart/values_yaml.py	100.00% <0.00%> (ø)

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