v1.2.2

Changed in 1.2.2

• Made @mermaid-js/mermaid-zenuml an optional, lazily loaded plugin. It moved
  from dependencies to an optional peerDependencies entry, is marked
  external in the library build, and is imported only when a zenuml diagram
  is actually rendered. The published bundle no longer ships the ~1.6MB ZenUML
  chunk, and a missing plugin no longer breaks other diagram types. ZenUML users
  install it with npm i @mermaid-js/mermaid-zenuml; the English, Turkish, and
  Chinese advanced examples now document this requirement.
• Widened the mermaid peer range from ^11.0.0 to ^11.0.0 || ^12.0.0,
  matching the versions the library is developed and tested against.
• Added a resetExternalDiagramRegistration helper (also re-exported from the
  components barrel) that clears the cached external-diagram registration.