Regression: Uncaught exception when getting nested keys

[indexzero]

When you set something to a string value and then attempt to get a child of that string value an unhandled Error is thrown.

This is a direct caused by incorrect use of the in keyword in #49

e.g.

  var nconf = require('nconf');
  nconf.set('foo:bar', 'SOME_STRING_VAUE');

  console.log(
    nconf.get('foo:bar:doesnt:exist') // should be undefined but throws
  );

[mhart]

The in keyword? I don't think I used that at all in #49 :

https://github.com/flatiron/nconf/pull/49/files

[mhart]

Again, I really don't see how this is related to #49 at all - but the fix is trivial: in #66