cannot be called on 'Map<dynamic, dynamic>?' because it is potentially null

[palmtown]

Describe the bug
When building my app with this package, I get the error "cannot be called on 'Map<dynamic, dynamic>?' because it is potentially null." We were able to resolve the issue by changing this._socket.io.options['extraHeaders'] = to this._socket.io.options!['extraHeaders'].

I have attached a screenshot of the error and a screenshot of the fix. Can you implement this fix or a fix you deem necessary to resolve the issue?

To Reproduce
Build app with package.

Expected behavior
Build successfully.

Screenshots

[Dahkenangnon]

Hi @palmtown
Thanks this.

It'll be nice to make a PR.

Can you ?

[mariocarro]

There is a PR available that fixes this issue. Can you merge it and release a new version?