fix: Opera add-ons does not accept the .enc file extension

gulpfile.js

@@ -211,10 +211,10 @@ function secrets(done) {
 
     const ciphertext = CryptoJS.AES.encrypt(data, key).toString();
 
-    writeFileSync(path.join(distDir, 'secrets.json.enc'), ciphertext);
+    writeFileSync(path.join(distDir, 'secrets.txt'), ciphertext);
   } catch (err) {
     console.log(
-      'Secrets are missing, secrets.json.enc will not be included in the extension package.'
+      'Secrets are missing, secrets.txt will not be included in the extension package.'
     );
   }
 

src/background/main.js

@@ -227,7 +227,7 @@ async function prepareAudio(audio) {
 
 async function loadSecrets() {
   try {
-    const ciphertext = await (await fetch('/secrets.json.enc')).text();
+    const ciphertext = await (await fetch('/secrets.txt')).text();
 
     const key = sha256(
       (await (await fetch('/src/background/script.js')).text()) +