Revert "docs(readme): revert import changes until new version is stable"

This reverts commit d158ea82fa214b54401fd4123e387d1e2796ae4d.

README.md

@@ -23,7 +23,7 @@ with yarn:
 
 ```js
 // The usage -
-import Peer from "peerjs";
+import { Peer } from "peerjs";
 ```
 
 **Create a Peer**