v0.16.0

• -sweep-ports open|all compares every port of one address instead of keeping
  the first that answers - the same IP can land on FRA on 4500 and ARN on 2408,
  at half the ping (#15)
• -ping-target aims the in-tunnel ping somewhere other than 1.1.1.1; it takes
  a hostname too, resolved inside the tunnel
• a live view that fails to start no longer aborts the command: warpscout falls
  back to plain output and finishes the scan (#16)
• a phase that fails now quits the live view instead of leaving it spinning

Commits

• fix: fall back to plain output when the live TUI cannot start (closes #16) (db4ac9e)
• fix: quit the live TUI when a phase fails (695a92a)
• feat: add -ping-target to aim the in-tunnel ping (b85d7f4)
• feat: add -sweep-ports to probe every port of an endpoint (closes #15) (435c286)