Set mermaid font

[0atman]

I see how to change the mermaid theme, but can we change the font inside the diagrams? the default is a little w e b s a f e...

Thanks as ever for this!

[mfontanini]

Using the change in #833 you can create a config file that uses the fontFamily mermaid config parameter like:

{
  "fontFamily": "Courier"
}

[0atman]

Works pefectly, wow, incredible! Thank you so much, this is so exciting!