Improve packet type

[naseemkullah]

The kind of change this PR does introduce

• a bug fix
• a new feature
• an update to the documentation (formatted readme)
• a code change that improves performance
• other

Other information (e.g. related issues)

improve packet type

[naseemkullah]

cc @darrachequesne

[naseemkullah]

@darrachequesne I noticed within the engine codebase string is sufficient, but IRL i also got array type, can this really be anything?

[naseemkullah]

CI failing with:

npm ERR! Error while executing:
npm ERR! /usr/bin/git ls-remote -h -t ssh://git@github.com/uNetworking/uWebSockets.js.git
npm ERR! 
npm ERR! Warning: Permanently added the RSA host key for IP address '140.82.112.4' to the list of known hosts.
npm ERR! git@github.com: Permission denied (publickey).
npm ERR! fatal: Could not read from remote repository.
npm ERR! 
npm ERR! Please make sure you have the correct access rights
npm ERR! and the repository exists.
npm ERR! 
npm ERR! exited with error code: 128

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/runner/.npm/_logs/2021-11-25T21_31_18_011Z-debug.log
Error: Process completed with exit code 1.

[darrachequesne]

@naseemkullah your PR has been merged in e122e4b

Thanks a lot for your work on this 👍