switch to native javascript bind

[david-fong]

The kind of change this PR does introduce

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

Current behaviour

Uses component-bind.

New behaviour

Uses javascript's native function binding, which is supported everywhere (IE9 and up). I have no qualms if this PR is rejected for the sake of the stability of the code base / "if-it's-not-broken-don't-fix-it". My thinking here is that if socket.io no longer needs a simple dependency, it's best to get rid of it.

Other information (e.g. related issues)

This is an answer to one of my questions in #1417.

[david-fong]

@darrachequesne The browser build on GitHub actions is failing:

Error:
Zuul tried to run tests in saucelabs, however no saucelabs credentials were provided.
See the zuul wiki (https://github.com/defunctzombie/zuul/wiki/Cloud-testing) for info on how to setup cloud testing.

Do you know how to fix it?

[darrachequesne]

Yes, the build failing is "normal" because the Sauce Labs token is not attached to the build from a fork (so that this token is not leaked). Let me test it on a branch of the repo (here EDIT: build is OK!).

Regarding the component-bind dependency, I think that is indeed a legacy from IE 6/7/8 support.

Anyway, thanks a lot for digging into this 👍

[darrachequesne]

Merged as 7bc7a7b.

I have only edited the package.json file, from "backo2": "^1.0.2" to "backo2": "~1.0.2"

Thanks a lot!