chore(deps): modernize platformclient tooling

ts_infohtml/classes.infohtml.ts

@@ -16,7 +16,6 @@ export class InfoHtml {
   public static async fromSimpleText(textArg: string) {
     const infohtmlInstance = new InfoHtml({
       text: textArg,
-      heading: null,
     });
     await infohtmlInstance.init();
     return infohtmlInstance;
@@ -30,8 +29,8 @@ export class InfoHtml {
 
   // INSTANCE
   public options: IHtmlInfoOptions;
-  public smartntmlInstance: plugins.smartntml.Smartntml;
-  public htmlString: string;
+  public smartntmlInstance?: plugins.smartntml.Smartntml;
+  public htmlString = '';
   constructor(optionsArg: IHtmlInfoOptions) {
     this.options = optionsArg;
   }