don't mutate properties or options

[lukepighetti]

💡 Motivation and Context

I was sending an analytics payload to multiple providers, Posthog was mutating the properties map and adding in $screen_name

💚 How did you test it?

📝 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]

Good point, thanks @lukepighetti

[marandaneto]

@lukepighetti would you mind adding a CHANGELOG entry?