support skipLazyLoaded option

[srsudar]

Overview

The node-detective-amd module has a skipLazyLoaded option that makes it possible to ignore dynamic requires.

This PR adds the same option to this library, making it possible to indicate that something like this is legal:

function foo() {
  const doThing = require('./a');
  doThing();
}

[XhmikosR]

@srsudar please make a PR to update README.md to mention the options and CC me, thanks.