Drop support for Debian 10, Ubuntu 18, and FreeBSD 12

Author: wyardley

metadata.json

@@ -23,14 +23,12 @@
     {
       "operatingsystem": "Debian",
       "operatingsystemrelease": [
-        "10",
         "11"
       ]
     },
     {
       "operatingsystem": "Ubuntu",
       "operatingsystemrelease": [
-        "18.04",
         "20.04",
         "22.04"
       ]
@@ -44,7 +42,6 @@
     {
       "operatingsystem": "FreeBSD",
       "operatingsystemrelease": [
-        "12",
         "13",
         "14"
       ]