Coverage plugin can't import `jest.config.ts`

[matejchalk]

The cjs format is assumed, which doesn't work with jest.config.ts files.

1288,1290c1302,1303
<   const testConfig = await importEsmModule({
<     filepath: pathToConfig,
<     format: "cjs"
---
>   const { mod } = await bundleRequire2({
>     filepath: pathToConfig
1291a1305
>   const testConfig = "default" in mod ? mod.default : mod;