Support for LiveView 0.17, unsubscribe, and live_session_on_mount option

[0.12.1] - 2022-02-15

Added

• Support phoenix_live_view 0.17 #109 by @ananthakumaran
• Add :live_session_on_mount option #110 by @neslinesli93
• Add toggle switch per node to unsubscibe from all queues #114 by @ananthakumaran

Changed

• Use relative time format #113 by @ananthakumaran
• improve table layout #111 by @ananthakumaran