add some comments, bump to rc4

lib/properties/PropertyString.ts

@@ -1,8 +1,16 @@
 import { PackagePropertyString } from "../types"
 
+/**
+ * A Property String is an arbitrary string value to display to the user
+ */
 export class PropertyString {
   private constructor(readonly data: PackagePropertyString) {}
-  static of(value: Omit<PackagePropertyString, "type" | "watch">) {
+  /**
+   * Returns a new Property String with the provided options
+   * @param value
+   * @returns
+   */
+  static of(value: Omit<PackagePropertyString, "type">) {
     return new PropertyString({
       ...value,
       type: "string",