Make mermaid global, and use $ directly

.eslintrc

@@ -1,9 +1,10 @@
 {
   "extends": [
     "dabapps/commonjs",
-    "dabapps/browser",
+    "dabapps/browser"
   ],
   "globals": {
-    "$": true
+    "mermaid": true
+
   }
 }

static/src/js/index.js

@@ -1,6 +1,6 @@
 'use strict';
 
-require('./jquery-global');
+var $ = require('./jquery-global');
 require('./fa');
 require('bootstrap');