Relax uuid dependency

[jeremyzahner]

This PR should solve various problems within earlier versions of uuid.

Example: uuidjs/uuid#252

[bvaughn]

Did you test this?

This library uses the uuid package like so:

import uuid from "uuid";

uuid.v4();

The docs for v3 of the uuid package show usage as:

const uuidv4 = require('uuid/v4');
uuidv4();

Those don't look compatible.

[jeremyzahner]

@bvaughn Yes. Technically, it still works for v2 and v3 of the uuid package. It is deprecated thou.

[Deprecation warning: The use of require('uuid') is deprecated and will not be supported after version 3.x of this module. Instead, use require('uuid/[v1|v3|v4|v5]') as shown in the examples below.]

We could change the usage now. This would break compatibility with v2 (of uuid).