Fixes

GraphObjects.md: [ and ] should be escaped in text (they're links otherwise)
flow.jison: fixed a parsing issue when the direction is omitted (defaults to 'TB')
stateRenderer-v2: was silently failing due to a try/catch in the parse function. (intentional?) removed to show errorHandler
mermaidAPI: removed unnecessary call to updateRendererConfigs since reinitialize does this

src/mermaidAPI.js

@@ -205,7 +205,6 @@ const render = function(id, _txt, cb, container) {
   } else {
     configApi.reset();
     const siteConfig = getSiteConfig();
-    updateRendererConfigs(siteConfig);
     reinitialize(siteConfig);
   }