ca-certificates-mono:
  Installed: 5.18.1.28-0xamarin5+ubuntu1804b1
  Candidate: 6.0.0.319-0xamarin2+ubuntu1804b1
  Version table:
     6.0.0.319-0xamarin2+ubuntu1804b1 500
        500 https://download.mono-project.com/repo/ubuntu vs-bionic/main amd64 Packages
        500 https://download.mono-project.com/repo/ubuntu vs-bionic/main i386 Packages
 *** 5.18.1.28-0xamarin5+ubuntu1804b1 100
        100 /var/lib/dpkg/status
     4.6.2.7+dfsg-1ubuntu1 500
        500 http://nl.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        500 http://nl.archive.ubuntu.com/ubuntu bionic/universe i386 Packages