module-deps seems incompatible with node-resolve

See https://stackoverflow.com/q/51347558/1198896 for the detailed background, but basically, given the following minimal testcase:

`test.js`:

```js
require('./test2.js');
```

`test2.js`: (empty)

`test3.js`:

```js
var resolve = require('resolve'),
mdeps = require('module-deps'),
through2 = require('through2');

var md = mdeps({
resolve: resolve
});

md.end(require.resolve('./test.js'));
```

Running `test3.js` creates this output:

```
events.js:183
throw er; // Unhandled 'error' event
^

Error: Cannot find module './test2.js' from '/Users/alex/Development/audittool/test.js'
at /Users/alex/Development/audittool/node_modules/resolve/lib/async.js:65:35
at load (/Users/alex/Development/audittool/node_modules/resolve/lib/async.js:84:43)
at onex (/Users/alex/Development/audittool/node_modules/resolve/lib/async.js:109:17)
at /Users/alex/Development/audittool/node_modules/resolve/lib/async.js:12:69
at FSReqWrap.oncomplete (fs.js:152:21)
```

The problem seems to be that `node-resolve` is not getting the correct `basedir` in its options object. Modifying `node_modules/module-deps/index.js` to insert `if (parent.package) parent.basedir = parent.package.__dirname;` on line 170 (right before the `self.resolver()` call) appears to fix this issue. I would PR but I don't know the source well enough to judge whether that's actually the correct place.