Bundler comments out require.resolve call despite of module marked as external

[shameleo]

Bug report

What is the current behavior?
Bundler removes require.resolve, even when module is external

If the current behavior is a bug, please provide the steps to reproduce.
Webpack config:

module.exports = {
    mode: 'development',
    target: 'node',
    entry: './entry.js',
    externals: function(context, request, callback) {
		if (/^\.\/dep-dynamic$/.test(request)){
			return callback(null, 'commonjs ' + request);
		}
		callback();
	},
    output: {
        filename: 'bundle.js',
    }
};

entry.js

const depDynamic = require('./dep-dynamic');
console.log(JSON.stringify(depDynamic));

const depDynamicPath = require.resolve('./dep-dynamic');
console.log(depDynamicPath);

dep-dynamic.js
module.exports = "doesn't matter";

What is the expected behavior?
If module remains external then require.resolve invocation must be left in bundle in order to return absolute path to this module

Other relevant information:
webpack version: 4.28.4
Node.js version: 8.9.4

[webpack-bot]

This issue had no activity for at least half a year.

It's subject to automatic issue closing if there is no activity in the next 15 days.

[webpack-bot]

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