Request: Typescript Support

[JacobRex]

I see typescript errors when trying to use the injected props in my child component. Typescript is unable to find these injections. The code renders locally, but these typescript errors break the build of my application.

Things I've tried

1. This works as expected, but I get this breaking typescript error

2. This does not work, and gives me this typescript error. I thought this might work because this was shown in the documentation.

The Solution I'd Like

I would like to be able to access my props directly this.myProp or through some const to make it clear that it's injected like this.ProxiInjection.myProp without any typescript errors

Reproduction

You can explore a reproduction of this error here: https://codesandbox.io/s/vue-typescript-example-forked-x4h98x?file=/src/App.vue

[privatenumber]

This package doesn't contain types right now but I'm happy to accept a PR to add them.