Paxos v19.0.0-alpha.0

• Make seedrandom a development dependency. Closes #445.
• Caret pin sibling dependencies. Closes #444.
• Upgrade avenue to 0.2.0-alpha.0. Closes #443.
• Add /.dots to .gitignore. Closes #442.
• Create Markdown readme with badges. Closes #439.
• Upgrade Chaos Monkey to use latest Paxos. Closes #440.
• Build with Actions, ship coverage to Codecov. Closes #438. Closes #437.
• Merge Chaos Monkey sketch.
• Add seeded random.
• Revert tests to Proof. Closes #436.
• Ensure denizens acclimated after arrived in chaos monkey.
• First pass at chaos monkey.

Closes #446.