fix(core): update

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@pushrocks/smartpdf',
-  version: '3.0.6',
+  version: '3.0.7',
   description: 'create pdfs on the fly'
 }

ts/smartpdf.classes.smartpdf.ts

@@ -26,6 +26,7 @@ export class SmartPdf {
   }
 
   async start(headlessBrowserArg?: plugins.smartpuppeteer.puppeteer.Browser) {
+    const done = plugins.smartpromise.defer();
     // lets set the external browser in case one is provided
     this.headlessBrowser = headlessBrowserArg;
     // setup puppeteer
@@ -49,7 +50,9 @@ export class SmartPdf {
     this.htmlServerInstance.listen(3210, 'localhost');
     this.htmlServerInstance.on('listening', () => {
       this._readyDeferred.resolve();
+      done.resolve();
     });
+    await done.promise;
   }
 
   // stop