message: added return of promise to runEveryTest method
diff: * DESC: Common test/demo slides for all library features
  * DEPS: Used by various demos (./demos/browser, ./demos/node, etc.)
  * VER.: 3.0.0-beta.7
  -* BLD.: 20191130
  +* BLD.: 20191207
  */
  // Detect Node.js (NODEJS is ultimately used to determine how to save: either `fs` or web-based, so using fs-detection is perfect)
  @@ -97,7 +97,7 @@ function getTimestamp() {
  // ==================================================================================================================
  function runEveryTest() {
  - execGenSlidesFuncs( ['Master', 'Chart', 'Image', 'Media', 'Shape', 'Text', 'Table'] );
  + return execGenSlidesFuncs( ['Master', 'Chart', 'Image', 'Media', 'Shape', 'Text', 'Table'] );
  // Dont run this automatically as Html2Pptx needs table to be visible as of 2.2.0
  // if ( typeof table2slides1 !== 'undefined' ) table2slides1();
  