[MacPorts] #60335: cargo2port: support lock file V2

[MacPorts]

#60335: cargo2port: support lock file V2
-------------------------+----------------------
  Reporter:  FranklinYu  |      Owner:  raimue
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  contrib     |    Version:
Resolution:              |   Keywords:
      Port:              |
-------------------------+----------------------

Comment (by l2dy):

 Replying to [ticket:60335 FranklinYu]:
 > Possible blocker: to test the new code, we need to find a project that
 has migrated lock file to V2.

 Here are two examples:

 * https://github.com/rust-lang/rustfmt
 * https://github.com/rust-analyzer/rust-analyzer

-- 
Ticket URL: <https://trac.macports.org/ticket/60335#comment:2>
MacPorts <https://www.macports.org/>
Ports system for macOS