Add an ability to globally set the default options

[RomeroMsk]

I didn't find a way to set the default options globally, so they are merged with the options passed to the component from template. It would be great to have such ability, something like this (using Vue Plugins):

import VueAutonumeric from 'vue-autonumeric';
Vue.use(VueAutonumeric, {
    onInvalidPaste: 'ignore'
});

[AlexandreBonneau]

This is a great idea. I'll see what I can do about that!