add potential fix to JsPsychExtension not having version field issue#3565

cherriechang wants to merge 5 commits intomainjspsych/jsPsych:mainfrom

3541-jspsychextension-type-does-not-have-a-version-fieldjspsych/jsPsych:3541-jspsychextension-type-does-not-have-a-version-fieldCopy head branch name to clipboard