Migrate to the new SDKs

[marandaneto]

:bulb: Motivation and Context

Migrate to the new SDKs Upgrade tooling Add missing features

Closes https://github.com/PostHog/posthog-flutter/issues/23 Closes https://github.com/PostHog/posthog-flutter/issues/38 Closes https://github.com/PostHog/posthog-flutter/issues/46

:green_heart: How did you test it?

:pencil: Checklist

• [ ] I reviewed the submitted code.
• [ ] I added tests to verify the changes.
• [ ] I updated the docs if needed.
• [ ] No breaking change or entry added to the changelog.

[marandaneto]

almost all beyond me 🤣 I trust you've tested it 🥇

does this mean Android flutter apps would be able to test screen recording?

Nope, Flutter is its own thing, recording has to be done from scratch.