Remove lodash.difference dependency

[Semigradsky]

See https://lodash.com/per-method-packages for reasons for change.

I can send PR.

[ljharb]

This will dramatically increase the likelihood that an unrelated CVE will implicate this package. I strongly suggest preferring the per-method packages, and leaving it to app consumers to handle deduping with their bundler config.

[iamakulov]

Thanks for the v5 heads-up 🙌

To be fair, I'd probably drop the lodash.difference dependency altogether and switch to a plain .filter() instead:

// Before
var unknownOptions = arrayDifference(
    Object.keys(optionsObject),
    supportedOptions
);

// After
var unknownOptions = Object.keys(optionsObject)
    .filter(function (optionName) {
        return supportedOptions.indexOf(optionName) === -1;
    });

Happy to accept a PR!

[Semigradsky]

As I see you already use features which not supported in Node < 6.x (Array.isArray for example). So includes can be used.

[ljharb]

Array.isArray is supported in node 0.6.

[Semigradsky]

Oh, I was deceived by https://node.green/