Added modifiable Listener and Eloquent Model

Okay, a lot of changes, fixed, what not. Let's start with the drill so you don't have to read the whole README:

What's changed?

• The listener configuration now accepts the name of the Listener (or Subscriber) to handle the Two Factor Authentication check up. Contract is supplied.

What's added?

• The model configuration. It accepts the Eloquent Model (or anything) to handle the TOTP data. Contract is supplied.
• Added migration to the TOTP data.

What's removed?

• Nothing.

What's fixed?

• Added migration to the TOTP data. You can publish the migration and edit it. It's tied to the Model you set (by default, the one that includes this package). This fixes associating it with models using UUID or other non-integer types.

Laravel 7 support

Only that. Minor change to make it cross compatible with LTS (6) and latest (7).

Fixed code generation

/title

Now it works

Merge pull request #5 from DarkGhostHunter/master

Now it works. Entirely.