Add gecko_android to manifest.json

Also, lower strict_min_version for desktop to 140.0
See: #2735

Author: dteviot

plugin/manifest.json

@@ -34,6 +34,10 @@
         ],
         "optional": []
       },
+      "strict_min_version": "140.0"
+    },
+    "gecko_android": {
+      "id": "WebToEpub@Baka-tsuki.org",
       "strict_min_version": "142.0"
     }
   },