add some comments, bump to rc4

lib/properties/PropertyPage.ts

@@ -1,8 +1,18 @@
 import { PackagePropertyPage } from "../types"
 import { PropertyGroup } from "./PropertyGroup"
 
+/**
+ * A Property Page will display to the user as a button with a name a description.
+ * Clicking the button will take the user to a nested page displaying the provided
+ * list of Property Groups
+ */
 export class PropertyPage {
   private constructor(readonly data: PackagePropertyPage) {}
+  /**
+   * Returns a new Property Page with the provided options
+   * @param options
+   * @returns
+   */
   static of(options: {
     name: string
     description: string | null