CLI: add error handling for latest_version helper

[Hypnosphi]

Issue: #3275 doesn't provide good messages for not yet published packages, see #3244 CI failure. Plus, it doesn't actually work with npm and uses spawnSync which makes job slower.

What I did

Added error handling, used async spawn

[codecov]

Codecov Report

Merging #3297 into master will decrease coverage by 0.02%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #3297      +/-   ##
==========================================
- Coverage   36.12%   36.09%   -0.03%     
==========================================
  Files         445      445              
  Lines        9775     9783       +8     
  Branches      918      907      -11     
==========================================
  Hits         3531     3531              
- Misses       5657     5709      +52     
+ Partials      587      543      -44

Impacted Files	Coverage Δ
lib/cli/lib/latest_version.js	0% <0%> (ø)	⬆️
app/vue/src/server/utils.js	0% <0%> (-100%)	⬇️
addons/storyshots/src/rn/loader.js	53.33% <0%> (ø)	⬆️
addons/knobs/src/components/types/Array.js	34.14% <0%> (ø)	⬆️
.../ui/components/stories_panel/stories_tree/index.js	38.73% <0%> (ø)	⬆️
addons/storysource/src/loader/traverse-helpers.js	60.86% <0%> (ø)	⬆️
addons/info/src/components/types/OneOf.js	61.11% <0%> (ø)	⬆️
lib/ui/src/modules/ui/containers/search_box.js	23.52% <0%> (ø)	⬆️
.../src/modules/ui/components/stories_panel/header.js	28.57% <0%> (ø)	⬆️
lib/ui/src/modules/api/actions/api.js	51.85% <0%> (ø)	⬆️
... and 55 more

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