Try to fix some flaky tests

[mveytsman]

Here's my attempt at making our tests less flaky, it doesn't 100% work but I tried.

• Add a missing handle_info
• Fix a flaky URL generation bug for google maps
• Mess with running some tests without async
• See https://github.com/phoenixframework/phoenix/pull/3856
• Bump dependencies 🤷

[mveytsman]

I'll tackle the presence spew again next time!