Prerequisites

• I have read the Contributing Guidelines.
• I agree to follow the Code of Conduct.
• I have searched for existing issues that already report this problem, without success.

Stencil Version

2.13.0

Current Behavior

Rollup provides an option to supply a value for external (a string, regex, array of either or a function) - https://rollupjs.org/guide/en/#external However stencil does not support this option in the rollupConfig.inputOptions section of a stencil.config

Expected Behavior

With an external option specified the matching packages would be excluded from the output bundle (per rollups default behavior)

Steps to Reproduce

Add

rollupConfig: { inputOptions: { external: /foo*/, } }, 

to a stencil.config.ts in a new project and observe that the option is flagged as an error by typescript and that it has no impact on the generated bundle files.

Code Reproduction URL

Additional Information

There is commentary about supporting this rollup option in #1938 - but that issue is now stale and only contributors can comment.