virtio-queue-ser v0.4.0

Added

• Derived Eq for state::QueueStateSer.

Changed

• Updated vm-memory from 0.9.0 to 0.10.0.
• Updated virtio-queue from 0.6.1 to 0.7.0 and fix version to exactly 0.7.0 to ensure the crates
  are always updated in lock-step.
• Upgrade rust edition to 2021