Microbundle ignores `*.ts` files if they contain only types. Example of the file: https://github.com/XaveScor/signal-components/blob/dff96fd7151db5aae7421059836794a7880c2649/src/types.ts. ### Reproduction: ``` git clone https://github.com/XaveScor/signal-components git checkout tags/v0.11.0 pnpm install pnpm build ``` ### Expected Result: `types.d.ts` is included in the `./dist` directory. ### Actual Result: `types.d.ts` does not exist. Types are broken because we have `./types` imports, but the file is missing.