Error:

[!] The following Swift pods cannot yet be integrated as static libraries:

The Swift pod `FirebaseCoreInternal` depends upon `GoogleUtilities`, which does not define modules. To opt into those targets generating module maps (which is necessary to import them from Swift when building as static libraries), you may set `use_modular_headers!` globally in your Podfile, or specify `:modular_headers => true` for particular dependencies.

How to reproduce

1. git clone git@github.com:RodolfoGS/FirebaseCoreInternal-issue.git
2. cd FirebaseCoreInternal-issue/
3. npm i
4. cd ios
5. pod install
6. Error happens