VuePasswordAuto input focus on load

Hi,

When i'm using VuePasswordAuto then input is automaticlly focus:
```
Vue.use(VuePassword, {
    type : 'auto',
})

// ...

<VuePassword
         v-model="registerForm.password"
         :strength="registerForm.passwordStrength"
         id="passwordInput"
         type="password"
/>
```

It's not happened for default VuePassword.
