Throwing an error doesn't work for monorepos

[gigaSproule]

We were noticing that with gatsby-source-contentful, it was unable to find the package.json (not sure why), but there was nothing being printed out. If the error is ignored, jest is able to handle it perfectly fine.

[grpawel]

I have the same issue and came up with the same fix. The problem is it would be a regression for #10

In my case the error was caused by require('jsonfile') in https://unpkg.com/[email protected]/lib/json/jsonfile.js not finding the dependency in /projectPath/node_modules/fs-extra/node_modules/jsonfile/index.js. Jest's defaultResolver finds the file without problems.

[piranna]

Pull Requests welcome.

[grpawel]

Looks like #12 attempts to fix the same issue. I've just tested it and it works in my case, no error on 'jsonfile'.

Those changes are also consistent with defaultResolver in https://github.com/facebook/jest/blob/main/packages/jest-resolve/src/defaultResolver.ts#L118

[gigaSproule]

If the other PR is a better fix, go for it. I'll try and check it out to see if it also fixes our issue.

[grpawel]

@piranna If you would point out issues that prevent merging #12, I can fix them.