[List command] Display owner name with list command

[yutailang0119]

When mint install, it also specifies owner name of repository, but list command does not display it.
Since this is inconvenient, I will propose to show owner name even in list command.

Current behavior

$ mint install yonaskolb/XcodeGen

$ mint list
🌱  Installed mint packages:
  Ice
    - 0.7.0
    - 0.7.2
  XcodeGen
    - 2.2.0
  xcopen
    - 0.1.0

Expected Behavior

$ mint list
🌱  Installed mint packages:
  jakeheis/Ice
    - 0.7.0
    - 0.7.2
  yonaskolb/XcodeGen
    - 2.2.0
  yutailang0119/xcopen
    - 0.1.0

[yonaskolb]

Fixed by #170