BeforeFind hook called without model

Hi, everyone! Doing:

let MyModel = db.define('MyModel', {...}, {...})

MyModel.findOne({ where: {id: 'my-id'}})

MyModel.addHook('beforeFindAfterOptions', function(options) {
    console.log(options.model); // undefined
};

MyModel.addHook('beforeFind', function(options) {
    console.log(options.model); // undefined
};

After query above, this hooks have been called without model MyModel included. I think it might be better to always include current model to hook arguments, because currently I need to determine by what model I performing query.

[felixfbecker]

@sushantdhiman It is not clear though that a function you had through addHook() will be attached/applied with this to the Model @euqen If you want to do a PR I think this would be a nice addition to the docs

[sushantdhiman]

No need to add this in docs, calling a method on object will point to that object via this