mermaid update

Author: lamprosfasoulas

package.json

@@ -168,7 +168,7 @@
     "markdownlint-rule-helpers": "^0.13.0",
     "markmap-lib": "^0.9.3",
     "mathjax": "~2.7.5",
-    "mermaid": "~8.10.2",
+    "mermaid": "^10.4.0",
     "mini-css-extract-plugin": "~0.4.1",
     "mocha": "~5.2.0",
     "mock-require": "~3.0.3",