fix: eslint does not fail build

[pauldambra]

follow-up to #843

that PR introduced new linting and didn't actually fix all of the errors

we were running yarn eslint as the CI step, this would run successfully with zero output regardless of whether the src folder was lint-able

Well, not any more!

[github-actions]

Size Change: 0 B

Total Size: 728 kB

ℹ️ View Unchanged

Filename	Size
dist/array.full.js	178 kB
dist/array.js	119 kB
dist/es.js	119 kB
dist/module.js	119 kB
dist/recorder-v2.js	95.1 kB
dist/recorder.js	58.4 kB
dist/surveys.js	39.7 kB

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