CMS-10541 Use hippo codemirror plugin 1.16.1

Version 1.16.1 is a Hippo-specific release (upstream only defines
1.16). It includes two fixes for the inline CKEditor:

 - ckeditor#82 ("CodeMirror hides inline editor toolbar")
 - ckeditor#91 ("CKeditor Inline mode: context menu not shown in firefox
   and chrome")

Both are very useful to have in the Channel Manager, which will
use the inline version of CKEditor.

package.json

@@ -4,7 +4,7 @@
   "private": true,
 	"description": "The development version of CKEditor - JavaScript WYSIWYG web text editor.",
   "dependencies": {
-    "hippo-ckeditor-codemirror-plugin": "1.13.0",
+    "hippo-ckeditor-codemirror-plugin": "1.16.1",
     "hippo-ckeditor-textselection-plugin": "1.06.0",
     "hippo-ckeditor-wordcount-plugin": "0.13.0",
     "hippo-ckeditor-youtube-plugin": "2.0.9"