feat: custom solve captcha function

src/rest/CaptchaSolver.js

@@ -1,8 +1,9 @@
 'use strict';
 module.exports = class CaptchaSolver {
-  constructor(service, key) {
-    this.service = '';
+  constructor(service, key, defaultCaptchaSolver) {
+    this.service = 'custom';
     this.solver = undefined;
+    this.defaultCaptchaSolver = defaultCaptchaSolver;
     this._setup(service, key);
   }
   _missingModule(name) {
@@ -37,6 +38,9 @@ module.exports = class CaptchaSolver {
           throw this._missingModule('2captcha');
         }
       }
+      default: {
+        this.solve = this.defaultCaptchaSolver;
+      }
     }
   }
   solve() {}