update helm-chart deployment to k8s 1.16+

[Cyanopus]

In 1.16+ k8s supports only apps/v1 . It will still be compatible with older versions as apps/v1 is available since 1.9

https://kubernetes.io/blog/2019/07/18/api-deprecations-in-1-16/

[codecov[bot]]

Codecov Report

Merging #46 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #46   +/-   ##
=======================================
  Coverage   47.61%   47.61%           
=======================================
  Files           4        4           
  Lines         210      210           
=======================================
  Hits          100      100           
  Misses        107      107           
  Partials        3        3           

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[lcostea]

@Cyanopus I think you should bump also the chart version (probably 0.2.0)

[Cyanopus]

@lcostea I've updated to 1.8 as this is no breaking change.