sources:
  "19.19":
    sha256: 7af455bb422d3ae5ef369c51ee64e98fa68c39435b0fa23be2e5d593a3d45b87
    url: https://github.com/davisking/dlib/archive/v19.19.tar.gz
  "19.21":
    sha256: 116f52e58be04b47dab52057eaad4b5c4d5c3032d927fe23d55b0741fc4107a0
    url: https://github.com/davisking/dlib/archive/v19.21.tar.gz
