JS: Add a deprecated forwarder for Vue::Instance

javascript/ql/src/semmle/javascript/frameworks/Vue.qll

@@ -81,6 +81,11 @@ module Vue {
     kind = DataFlow::MemberKind::setter() and result = "set"
   }
 
+  /**
+   * DEPRECATED. This class has been renamed to `Vue::Component`.
+   */
+  deprecated class Instance = Component;
+
   /**
    * A Vue component, such as a `new Vue({ ... })` call or a `.vue` file.
    *