Markdown editor - H1 to H2 and H2 to H3 field problem

I have these fields.

  text:
  	label: Text
  	type: markdown
  	tools:
      - header1
      - header2
      - bold
      - italic
      - orderedList
      - unorderedList
      - link

But I want to make the H1 to H2 and H2 to H3 in the editor buttons. How can I do that?

You should be able to do that as described in the readme:

fields:
  text:
    label:   Text
    type:    markdown
    header1: h2
    header2: h3