fix types

Author: hyperz111

packages/prompts/src/spinner.ts

@@ -24,7 +24,7 @@ export interface SpinnerOptions extends CommonOptions {
 
 export interface SpinnerResult {
 	start(msg?: string): void;
-	stop(msg?: string, code?: number): void;
+	stop(msg?: string | null | undefined, code?: number): void;
 	message(msg?: string): void;
 	readonly isCancelled: boolean;
 }
@@ -163,7 +163,7 @@ export const spinner = ({
 		}, delay);
 	};
 
-	const stop = (msg, code = 0): void => {
+	const stop = (msg: string | null | undefined, code = 0): void => {
 		if (!isSpinnerActive) return;
 		isSpinnerActive = false;
 		clearInterval(loop);