fix(js): return empty array if no helper dependencies found

[nartc]

Current Behavior

one code path returns undefined instead of []. This results in failing build if a Node application does not have depend on any helper dependency (eg: tslib)

Expected Behavior

build should pass regardless of the app requiring helper dependency or not

Related Issue(s)

Fixes #

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✅ Successfully ran 12 targets

• nx affected --target=build --base=26177d15af643cb85d6c94530b02c7b3c29bbf98 --head=0c0aff74e71abf13875700de6ad784be55de00db --parallel=3
• nx affected --target=e2e --base=26177d15af643cb85d6c94530b02c7b3c29bbf98 --head=0c0aff74e71abf13875700de6ad784be55de00db --exclude=e2e-detox,e2e-js,e2e-next,e2e-workspace-create,e2e-workspace-integrations,e2e-workspace-core,e2e-react,e2e-web,e2e-angular-extensions,e2e-angular-core,e2e-cli,e2e-nx-plugin,e2e-cypress,e2e-node,e2e-linter,e2e-jest,e2e-a...
• nx affected --target=e2e --base=26177d15af643cb85d6c94530b02c7b3c29bbf98 --head=0c0aff74e71abf13875700de6ad784be55de00db --exclude=e2e-storybook,e2e-react-native,e2e-detox --parallel=1
• nx affected --target=lint --base=26177d15af643cb85d6c94530b02c7b3c29bbf98 --head=0c0aff74e71abf13875700de6ad784be55de00db --parallel=3
• nx affected --target=test --base=26177d15af643cb85d6c94530b02c7b3c29bbf98 --head=0c0aff74e71abf13875700de6ad784be55de00db --parallel=1
• nx build typedoc-theme
• nx-cloud record -- yarn check-commit
• nx-cloud record -- yarn check-imports
• nx-cloud record -- yarn depcheck
• nx-cloud record -- yarn documentation
• nx-cloud record -- yarn nx format:check --base=26177d15af643cb85d6c94530b02c7b3c29bbf98 --head=0c0aff74e71abf13875700de6ad784be55de00db
• nx-cloud record -- yarn nx workspace-lint

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1 Ignored Deployment

Name	Status	Preview	Updated
nx-dev	⬜️ Ignored (Inspect)		Jun 4, 2022 at 3:32AM (UTC)

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