Fix defineProperty type casting issue causing test failures

Author: laghee

injected/src/content-feature.js

@@ -281,7 +281,7 @@ export default class ContentFeature extends ConfigFeature {
             }
         });
 
-        return defineProperty(object, String(propertyName), /** @type {any} */ (descriptor));
+        return defineProperty(object, propertyName, /** @type {import('./wrapper-utils').StrictPropertyDescriptor} */ (descriptor));
     }
 
     /**

injected/src/wrapper-utils.js

@@ -14,7 +14,7 @@ export const ddgShimMark = Symbol('ddgShimMark');
  * FIXME: this function is not needed anymore after FF xray removal
  * Like Object.defineProperty, but with support for Firefox's mozProxies.
  * @param {any} object - object whose property we are wrapping (most commonly a prototype, e.g. globalThis.BatteryManager.prototype)
- * @param {string} propertyName
+ * @param {string | number | symbol} propertyName
  * @param {import('./wrapper-utils').StrictPropertyDescriptor} descriptor - requires all descriptor options to be defined because we can't validate correctness based on TS types
  */
 export function defineProperty(object, propertyName, descriptor) {