Adapt a few more extractor filters to the new mimetype-based format

src/lib/scripts/sncf.json

@@ -45,7 +45,7 @@
         "filter": [
             {
                 "match": "^2200",
-                "type": "Barcode",
+                "mimeType": "application/octet-stream",
                 "scope": "Descendants"
             }
         ],

src/lib/scripts/trenitalia.json

@@ -2,7 +2,7 @@
     {
         "mimeType": "application/pdf",
         "filter": [
-            { "type": "Barcode", "match": "^ \\x{14}", "scope": "Descendants" }
+            { "mimeType": "application/octet-stream", "match": "^ \\x{14}", "scope": "Descendants" }
         ],
         "script": "trenitalia.js",
         "function": "parsePdf"

src/lib/scripts/vr.fi.json

@@ -2,7 +2,7 @@
     "filter": [
         {
             "match": "^\\x{10}",
-            "type": "Barcode",
+            "mimeType": "application/octet-stream",
             "scope": "Descendants"
         }
     ],