Merge pull request #342 from voxpupuli/maint/drop-eol-os-debian8

drop support for debian 8 (EOL)

Author: jhoblitt

metadata.json

@@ -52,7 +52,6 @@
     {
       "operatingsystem": "Debian",
       "operatingsystemrelease": [
-        "8",
         "9",
         "10"
       ]