Fix cargo email attributions

Dependencies

• [2] ENARAOAB Tweak Cargo manifest for gemini
• [3] JFL253ZZ Actually include source files, whoops!
• [4] AOSTKTLO Licensing
• [5] 5II6T7YE Add gemini library

Change contents

• replacement in sputnik/Cargo.toml at line 2
  [3.4954]→[3.4954:5003](∅→∅)
  − authors = ["Matthew Ess <daringseal@gmail.com>"]
  [3.4954]

  [3.5003]
  + authors = ["Matthew Ess <mat@mat.services>"]
• replacement in gemini/Cargo.toml at line 2
  [3.9749]→[2.0:53](∅→∅)
  − authors = ["Matthew Ess <daringseal@gmail.com>"]
  [3.9749]

  [2.53]
  + authors = ["Matthew Ess <mat@mat.services>"]