[FIX] #7 node_modules with .js in the name

[vkrol]

If the "import/extensions" rule is activated then the following import statement causes the error:

import "popper.js";

causes the following error

Resolve error: Cannot find module 'popper' from 'D:\Projects\eslint-import-resolver-typescript\tests'  import/extensions

This code is ported from the previous version of the file 87a9e00#diff-168726dbe96b3ce427e7fedce31bb0bcL20

These changes fixes this error. I do not know how to test it correctly via unit test because we need to install some npm package with ".js" suffix in the name for this test.

[bradzacher]

hi @vkrol - feel free to install popper.js as a dev dependency, and add it to the test file as an import.

then you can test it using npm test

[vkrol]

@bradzacher I think that I found a better solution.