Null safety migration

[dna-f]

Hi!
Is null safety migration on roadmap?

[tiholic]

There is an open PR #163

Feel free to review and share any inputs.
I will review and land it soon.

[byshy]

any updates on this? @tiholic

[dna-f]

I migrate to https://pub.dev/packages/socket_io_client
The switch was quite simple.
The library covers all platforms and depends on dart only (no native platform code)
Give it a try!