FIX failing scripts exiting with 0

[ndelangen]

Issue: -some script were not exiting correctly

What I did

made sure they exit with 1 when there's an error somewhere.

[codecov]

Codecov Report

Merging #1807 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1807   +/-   ##
=======================================
  Coverage   21.32%   21.32%           
=======================================
  Files         257      257           
  Lines        5739     5739           
  Branches      700      696    -4     
=======================================
  Hits         1224     1224           
+ Misses       3984     3975    -9     
- Partials      531      540    +9

Impacted Files	Coverage Δ
...res__/update-addon-info/update-addon-info.input.js	0% <0%> (ø)	⬆️
app/react-native/src/preview/story_kind.js	0% <0%> (ø)	⬆️
addons/events/src/components/Event.js	0% <0%> (ø)	⬆️
.../ui/src/modules/ui/components/layout/dimensions.js	15.62% <0%> (ø)	⬆️
addons/knobs/src/KnobStore.js	6.81% <0%> (ø)	⬆️
addons/knobs/src/components/PropForm.js	8.51% <0%> (ø)	⬆️
addons/knobs/src/components/types/Select.js	7.93% <0%> (ø)	⬆️
addons/knobs/src/components/types/Boolean.js	11.62% <0%> (ø)	⬆️
addons/info/src/components/Props.js	36.36% <0%> (ø)	⬆️
app/react-native/src/bin/storybook-build.js	0% <0%> (ø)	⬆️
... and 16 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7b4c192...6e1ddab. Read the comment docs.

[ndelangen]

Sorry about the self-merge, this is actually a rather critical issue