fix: add missing type to hrandfield (#1028)

* fix: add missing type to hrandfield

* ci: increase test timeout

Author: ogzhanolguncu

.github/workflows/tests.yaml

@@ -34,7 +34,7 @@ jobs:
         run: bun run fmt
 
       - name: Run tests
-        run: bun test pkg --bail
+        run: bun test pkg --bail --timeout 20000
 
       - name: Build
         run: bun run build

pkg/redis.ts

@@ -641,7 +641,7 @@ export class Redis {
    * @see https://redis.io/commands/hrandfield
    */
   hrandfield: {
-    (key: string): Promise<string>;
+    (key: string): Promise<string | null>;
     (key: string, count: number): Promise<string[]>;
     <TData extends Record<string, unknown>>(
       key: string,