Reproduction steps

1. Run npm i
2. Run npm run build and observe warnings for UNRESOLVED_IMPORT
3. Run npm i ionic-core-7.1.1-fix.tgz
4. Run npm run build and observe no more warnings

Included tarballs

• ionic-core-7.1.1.tgz: Build of Ionic Framework using Stencil 4.0.1
• ionic-core-7.1.1-fix.tgz: Build of Ionic Framework using a local build of Stencil at 247b948