fix(core): update

ts/webstiore.classes.webstore.ts

@@ -23,15 +23,20 @@ export class WebStore<T = any> {
     });
   }
 
-  async get(key) {
+  async get(key: string) {
     return this.db.get(this.options.storeName, key);
   }
 
-  async set(key, val) {
+  async check(keyArg: string): Promise<boolean> {
+    const result = await this.get(keyArg);
+    return !!result;
+  }
+
+  async set(key: string, val: T) {
     return this.db.put(this.options.storeName, val, key);
   }
 
-  async delete(key) {
+  async delete(key: string) {
     return this.db.delete(this.options.storeName, key);
   }