With Vue3 by cdn I need to use app.use(VueNextRx) instead

[Thaina]

Describe the bug
VueRX is not really defined in this package and it not really register into vue. However there was global.VueNextRX defined

I think it's because vue3 change pattern into Vue.createApp then using app.use before app.mount

And so with this pattern. I need to use app.use(VueNextRx)

To Reproduce

1. use these package by cdn

		<script src="https://unpkg.com/vue@3"></script>
		<script src="https://unpkg.com/vue-router@4"></script>
		<script src="https://unpkg.com/rxjs@7/dist/bundles/rxjs.umd.min.js"></script>

		<script src="https://cdn.jsdelivr.net/npm/@nopr3d/vue-next-rx@1.0/dist/vue-next-rx.min.js"></script>

2. In js use var app = Vue.createApp({ subscriptions() { return { ... } } });
   2.1. If just use app.mount the subscriptions will not be called
   2.2. If use app.use(VueRx) it throw undefined VueRX error

Expected behavior

using app.use(VueNextRx) instead work normally as expected

Desktop (please complete the following information):

• OS: Windows
• Browser: chrome

Additional context

If I am correct the readme document should properly mention this behaviour

[github-actions]

Hi ! Thanks for this issue, i will look at it quickly !' first issue

[NOPR9D]

Yeah, my bad... At the html file who sevre as exemple i use VueNextRx, so it's a mistake with the readme...

Sorry !

But thanks for your issue ! I change that !