Stop failing the run and let the user decide how to proceed

[xt0rted]

This was brought up in #124. The only time we should fail the run is when the user lacks the required permissions to trigger this step so this removes the calls to setFailed() and replaces them with debug().

To tell if this step was a success or not you can check the out params like so:

- run: echo "Runs only on /lint js command"
  if: steps.command.outputs.command-name && steps.command.outputs.command-arguments == 'js'

A subsequent PR will add a new has-command out parameter that's meant for these types of checks.

This is a breaking change for v1 so it'll be released as v2.

[codecov]

Codecov Report

Merging #136 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master     #136   +/-   ##
=======================================
  Coverage   86.74%   86.74%           
=======================================
  Files           5        5           
  Lines          83       83           
  Branches       11       11           
=======================================
  Hits           72       72           
  Partials       11       11

Flag	Coverage Δ
#unittests	86.74% <100%> (ø)	⬆️

Impacted Files	Coverage Δ
src/commandHandler.ts	86.27% <100%> (ø)	⬆️

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[dav009]

is this getting merged soon ?