[office-js, office-js-preview] Add missing Office ExtensionLifeCycle property (DefinitelyTyped#74377)

Author: AlexJerabek

types/office-js-preview/index.d.ts

@@ -249,10 +249,15 @@ declare namespace Office {
      * Represents the Device Permission interface.
      */
     const devicePermission: DevicePermission;
+    /**
+     * Provides options to manage the user interface of an Office Add-in while the add-in is running.
+     */
+    const extensionLifeCycle: ExtensionLifeCycle;
     /**
      * Represents the ribbon associated with the Office application.
      */
     const ribbon: Ribbon;
+
     /**
      * Occurs when the runtime environment is loaded and the add-in is ready to start interacting with the application and hosted document.
      *

types/office-js/index.d.ts

@@ -249,10 +249,15 @@ declare namespace Office {
      * Represents the Device Permission interface.
      */
     const devicePermission: DevicePermission;
+    /**
+     * Provides options to manage the user interface of an Office Add-in while the add-in is running.
+     */
+    const extensionLifeCycle: ExtensionLifeCycle;
     /**
      * Represents the ribbon associated with the Office application.
      */
     const ribbon: Ribbon;
+
     /**
      * Occurs when the runtime environment is loaded and the add-in is ready to start interacting with the application and hosted document.
      *