Upgrade mermaid vesion and/or provide a mechanism to specify a mermaid to use.

[Aleod-m]

As described in the title.

[badboy]

You can always just download the latest mermaid and drop that into your project. This plugin shipping with it is just a convenience anyway. It won't automatically overwrite your existing files anyway.

(Regardless I should make it easier to update in this repo, right now it's a bit manual. But also ... I won't get to it this week)

[Aleod-m]

I'll maybe make a pr before the end of the week.