v3.1.0

Changed

• Upgrade dependencies and resolve discrepancies #88 (@devinturner)
• Fixes listener variable re-use #85 (@paulhamby)
• Add AWS_REGION to /etc/lifecycled in README #82 (@DavidWittman)
• Update spot flag #81 (@asantos-fuze)
• Update README.md #77 (@mohsen0)
• Restart lifecycled on SIGPIPE from systemd #75 (@lox)