SquidHub v0.21.0

A tidy-up round, with smarter squid teamwork as the headline.

Fixed

• Squids team up more naturally - picking up where a teammate left off and circling back to pull the work together.
• Squids on Gemini now actually do the work instead of just saying "Done".
• Pop-ups stay steady while you scroll.
• On a phone, the bottom tab bar stays put.

- SquidHub Team