Code errors should break the build

[purplecabbage]

Invalid JS, like adding an extra : to your action code will cause aio app build to choke and output a verbose error message that a developer can use to fix their code. ✅

However, if I call a function that is not import/required or reassign a value to a const it will happily webpack it .. even though, come runtime, it will certainly crash ❌

To test, simply add this to an action and watch it happily build ...

  const num = 100
  num = num + 1

[aiojbot]

JIRA issue created: https://jira.corp.adobe.com/browse/ACNA-1935