Stream Together Web Extension Versions Save

This release is primarily cleanup coming from v17.0.0 changes for cross-browser support.

• 007144d8dbf2d410369d23e373ed6d2e66441fc6 PeerJS dependency vulnerability fix
• fee8f30adf0fa5109ebd7213a7d1ecff2a340de7 Fixed the README to reflect Firefox & Chrome extension URLs
• 513d063aec084199067a7b7edb9953c13dd36c2d Improved error handling & connection state logic for Popup Svelte UI

This is a big release, and is preparing the extension for launch with a usable UI from @overthemike and cross-browser support in Firefox, Edge and Safari 14 (for Big Sur) -- any browser with WebExtension API support.

• 48d268c341d6c8f6d8b527cd958ab7d278f83272 Converted chrome. specific references to polyfill WebExtension APIs
• 84a9c51db78b3228c8b42459518a7433ff76e04c #2 Integrated UI from @overthemike fork into Svelte TS framework
• 20c77e77567722d372b68c2d857690e19300ab2c Use GitHub Actions build number for manifest file

• #1 by @SudharsanSukumar & @hnryjms - Cross-connect peers of the session to display an accurate counter for everyone.