Throw when afterResponse hook returns an invalid value

Fixes #1569

source/as-promise/index.ts

@@ -99,6 +99,10 @@ export default function asPromise<T>(firstRequest: Request): CancelableRequest<T
 
 							throw new RetryError(request);
 						});
+
+						if (!(is.object(response) && is.number(response.statusCode) && response.body)) {
+							throw new TypeError('The `afterResponse` hook returned an invalid value');
+						}
 					}
 				} catch (error) {
 					request._beforeError(error);

test/hooks.ts

@@ -145,6 +145,21 @@ test('catches beforeRetry thrown errors', withServer, async (t, server, got) =>
 	});
 });
 
+test('throws if afterResponse returns an invalid value', withServer, async (t, server, got) => {
+	server.get('/', echoHeaders);
+
+	await t.throwsAsync(got('', {
+		hooks: {
+			afterResponse: [
+				// @ts-expect-error
+				() => {}
+			]
+		}
+	}), {
+		message: 'The `afterResponse` hook returned an invalid value'
+	});
+});
+
 test('catches afterResponse thrown errors', withServer, async (t, server, got) => {
 	server.get('/', echoHeaders);
 

test/pagination.ts

@@ -716,7 +716,7 @@ test('calls init hooks on pagination', withServer, async (t, server) => {
 
 test('throws when transform does not return an array', withServer, async (t, server) => {
 	server.get('/', (_request, response) => {
-		response.end(JSON.stringify(""));
+		response.end(JSON.stringify(''));
 	});
 
 	await t.throwsAsync(got.paginate.all<string>(server.url));