gracefully support a lack of resolver settings

[zepumph]

This is to support PhET simulation integration of the default-import-match-filename rule. See #7

[minseoksuh]

@zepumph
Hi!

First of all, thank you so much for taking your time to looking into the issue and actually making a PR.

I have to let you know that common/resolve.js is a file I copied from eslint-plugin-import to make the rule default-import-match-filename work.

And it seems there already have been plenty reports on this issue.
What I found possibly promising were

import-js/eslint-plugin-import#828
airbnb/javascript#1730
https://stackoverflow.com/questions/44865507/eslint-no-duplicates-resolve-error-unable-to-load-resolver-node

Googling error code Resolve error: unable to load resolver "node" might give you more insights.

I believe trying out some of the suggested solutions will be more stable than fixing the code itself.

Let me know if you can find any workaround.

https://phet.colorado.edu/en/about

What a great great project btw.
I began coding about 2 - 3 years ago, and now I want to learn more about math and science nearly 5 years after college.
I think I can learn a lot from it.
Thanks for the great work!

[minseoksuh]

I believe you deleted the resolvers variable and it was undefined when I checked.

[zepumph]

Oops! Thanks for keeping me honest.

[zepumph]

That makes a lot of sense to me. Thanks for showing me some of that research. I appreciate it. I'll go ahead and close this and the issue.