fix: add extension button when challenge assets are loaded from recaptcha.net

Closes #194.

src/background/main.js

@@ -169,6 +169,7 @@ function addBackgroundRequestLitener() {
   ) {
     const urls = [
       'https://www.google.com/*',
+      'https://www.recaptcha.net/*',
       'https://api.wit.ai/*',
       'https://speech.googleapis.com/*',
       'https://*.speech-to-text.watson.cloud.ibm.com/*',

src/manifest.json

@@ -42,7 +42,10 @@
 
   "content_scripts": [
     {
-      "matches": ["https://www.google.com/recaptcha/api2/bframe*"],
+      "matches": [
+        "https://www.google.com/recaptcha/api2/bframe*",
+        "https://www.recaptcha.net/recaptcha/api2/bframe*"
+      ],
       "all_frames": true,
       "run_at": "document_idle",
       "css": ["src/solve/style.css"],