Add jsdoc-babel plugin

This is to stop jsdoc parsing errors.

More information in this thread:
https://github.com/jsdoc3/jsdoc/issues/555

docs/jsdoc.conf.json

@@ -2,7 +2,10 @@
     "tags": {
         "allowUnknownTags": true
     },
-    "plugins": ["plugins/markdown"],
+    "plugins": [
+        "plugins/markdown",
+        "node_modules/jsdoc-babel"
+    ],
     "templates": {
         "systemName": "CyberChef",
         "footer": "",

package.json

@@ -47,6 +47,7 @@
     "html-webpack-plugin": "^2.28.0",
     "imports-loader": "^0.7.1",
     "ink-docstrap": "^1.1.4",
+    "jsdoc-babel": "^0.3.0",
     "less": "^2.7.2",
     "less-loader": "^4.0.2",
     "style-loader": "^0.15.0",