added script and license

package.json

@@ -1,5 +1,9 @@
 {
   "dependencies": {
     "@adguard/aglint": "^2.0.0"
+  },
+  "license": "LGPL-3.0-or-later",
+  "scripts": {
+    "check": "aglint -f ublockorigin"
   }
 }