Drop support of Debian 9, Ubuntu 16.04 and FreeBSD 11 (EOL)

Author: smortex

metadata.json

@@ -60,23 +60,20 @@
     {
       "operatingsystem": "Debian",
       "operatingsystemrelease": [
-        "9",
         "10",
         "11"
       ]
     },
     {
       "operatingsystem": "Ubuntu",
       "operatingsystemrelease": [
-        "16.04",
         "18.04",
         "20.04"
       ]
     },
     {
       "operatingsystem": "FreeBSD",
       "operatingsystemrelease": [
-        "11",
         "12"
       ]
     },