bump k8s deps to v0.19.7

[dprotaso]

Didn't drop the require blocks. If Tekton adopts tag releases of knative.dev/pkg then their k8s version will be behind ours.

see: tektoncd/pipeline#3724

[dprotaso]

f'ing upstream folder rename lol

[codecov]

Codecov Report

Merging #427 (7d7e865) into master (9d3263f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #427   +/-   ##
=======================================
  Coverage   56.83%   56.83%           
=======================================
  Files           5        5           
  Lines         234      234           
=======================================
  Hits          133      133           
  Misses         65       65           
  Partials       36       36           

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[mattmoor]

Tekton is busted and needs investigation separately, so merging this. thanks!