Cannot use `composite` tsconfig.json setting

Created by: osdiab

Is this a bug report?

Yes

Did you try recovering your dependencies?

Yes

Which terms did you search for in User Guide?

typescript composite isolatedModules

Environment

  System:    OS: macOS 10.14.2
    CPU: (4) x64 Intel(R) Core(TM) i5-8210Y CPU @ 1.60GHz
  Binaries:
    Node: 11.4.0 - ~/.nvm/versions/node/v11.4.0/bin/node
    Yarn: 1.16.0 - /usr/local/bin/yarn
    npm: 6.4.1 - ~/.nvm/versions/node/v11.4.0/bin/npm
  Browsers:
    Chrome: Not Found
    Firefox: Not Found
    Safari: Not Found
  npmPackages:
    react: Not Found
    react-dom: Not Found
    react-scripts: Not Found
  npmGlobalPackages:
    create-react-app: Not Found

Steps to Reproduce

1. Run yarn create react-app my-app --typescript
2. add composite: true to tsconfig.json
3. run yarn start, get Option 'composite' cannot be specified with option 'isolatedModules'. TS5053
4. Remove isolatedModules line from tsconfig
5. run yarn start, create-react-app re-adds isolatedModules and you get the same error

Expected Behavior

I could use the composite flag

Actual Behavior

I can't use the composite flag

Reproducible Demo

Above steps will reproduce this, pretty trivial.

This is potentially equally as much a typescript issue, though this is not really big to me—i just want to be able to build all my packages in my monorepo in one command, rather than having a separate invocation of tsc --build for my website package. But thought I'd log the issue here.