Added clear function to cache

src/cache.ts

@@ -87,6 +87,13 @@ export class Cache<K extends string | number | symbol, T> {
 		return this;
 	}
 
+	/**
+	 * Remove all keys from cache
+	 */
+	clear() {
+		this.store = <Record<K, T>>{};
+	}
+
 	/**
 	 * Delete an item from the cache
 	 *