Print flat resource lists to comply with k8s list shape

[corneliusweig]

Fix #61

[codecov-commenter]

Codecov Report

Merging #85 into master will decrease coverage by 0.10%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master      #85      +/-   ##
==========================================
- Coverage   42.11%   42.01%   -0.11%     
==========================================
  Files           9        9              
  Lines         387      388       +1     
==========================================
  Hits          163      163              
- Misses        202      203       +1     
  Partials       22       22              

Impacted Files	Coverage Δ
internal/client/client.go	23.74% <0.00%> (-0.18%)	⬇️

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