Add e2e test for helm dep up

[hypnoglow]

Ref: #144

[codecov]

Codecov Report

Merging #171 (73e45c6) into master (33e922d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #171   +/-   ##
=======================================
  Coverage   45.27%   45.27%           
=======================================
  Files          18       18           
  Lines         466      466           
=======================================
  Hits          211      211           
  Misses        245      245           
  Partials       10       10           

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