Check to see if there are props when passing props to setup

[doug-wade]

Currently, we have this example in the docs

defineComponent({
    name: 'setup-context',
    setup({}, { emit }): {
        emit('mounted');
    }
});

Which isn't aesthetically pleasing. We can check to see if props has one or more keys, and pass the context as the first argument instead, which would allow us to do the following

defineComponent({
    name: 'setup-context',
    setup({ emit }): {
        emit('mounted');
    }
});