Add Libravatar support

src/technologies/l.json

@@ -11,6 +11,15 @@
     },
     "website": "http://www.lepton-cms.org"
   },
+  "Libravatar": {
+    "cats": [
+      19
+    ],
+    "description": "freeing the web one face at a time.",
+    "html": "<[^>]+libravatar\\.org/avatar/",
+    "icon": "libravatar.png",
+    "website": "https://www.libravatar.org/"
+  },
   "LINE Login": {
     "cats": [
       69