Update README.md

Removed library as it did not work

Using an ES6 module now

Added common-tags library

changed few words on example text

Inlined the textareas

added inline

Online live conversion

Fixed not using data to write the h1-h6

Fixed bug on Regexp

Now parses sections and subsections to HTML h1-h6

Now changes file extension name

Needed to add async to the funtion definition

Added await so loop waits for Promise to be concluded

Maybe this works now?