Make "webp?" query optional

[Pacifist-Penguin]

Is your feature request related to a problem? Please describe. Feature request.

Describe the solution you'd like It's been almost 3 years since the development of this undeniably awesome module, and it looks like webp finally got popular enough to convert all of your images to it I'd really like to be able to simply convert any image without having to use ?webp query. Something like this would be awesome to have:

// nuxt.config.js
optimizedImages: {
    ...    
    optimizeAllImages: true
    ...
  },