Update for Google Chrome Extensions manifest v3

[roymckenzie]

• Updated to manifest v3
• Using service worker pattern
• Fixed issue with message port closing. Closes (Unchecked runtime.lastError: The message port closed before a response was received. #8).

[roymckenzie]

@kip-13 do you mind reviewing this? I got around to fixing the issue mentioned in #8 by updating the extension to use the manifest v3 pattern with service workers. This should close the issue, but wanted another eye on it before I merge into master.

[kip-13]

Hey @roymckenzie

I checked and it works really well. 🚀

I tried to fixed too days ago but without the upgrade to v3 and then I found an issue with the original medium post that distracted me:

The problem is because we do this.
I was trying to use a unicode as alternative and append in the text content directly but then I realized it's simpler for us to use a delay as an option, I did a PoC using this branch as base here #10

[kip-13]

lgtm