js: Use ES6 object literal shorthand syntax.

Generated by ESLint.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

static/js/typing.js

@@ -13,8 +13,8 @@ function send_typing_notification_ajax(user_ids_array, operation) {
             to: JSON.stringify(user_ids_array),
             op: operation,
         },
-        success: function () {},
-        error: function (xhr) {
+        success() {},
+        error(xhr) {
             blueslip.warn("Failed to send typing event: " + xhr.responseText);
         },
     });
@@ -53,9 +53,9 @@ function notify_server_stop(user_ids_array) {
 exports.get_recipient = get_user_ids_array;
 exports.initialize = function () {
     const worker = {
-        get_current_time: get_current_time,
-        notify_server_start: notify_server_start,
-        notify_server_stop: notify_server_stop,
+        get_current_time,
+        notify_server_start,
+        notify_server_stop,
     };
 
     $(document).on("input", "#compose-textarea", () => {