Update TinyMCE from 4.5.6 to 4.6.5 to fix formatting getting lost in editor

[MAILPOET-1702]

package-lock.json

@@ -8420,9 +8420,9 @@
       }
     },
     "tinymce": {
-      "version": "4.5.6",
-      "resolved": "https://registry.npmjs.org/tinymce/-/tinymce-4.5.6.tgz",
-      "integrity": "sha1-Os2bUVMx2vP/TM2B1UTpFjDtDhs="
+      "version": "4.6.5",
+      "resolved": "https://registry.npmjs.org/tinymce/-/tinymce-4.6.5.tgz",
+      "integrity": "sha1-teqXZzjoGb8HpE99VlP7FgiAue4="
     },
     "tmp": {
       "version": "0.0.33",

package.json

@@ -43,7 +43,7 @@
     "select2": "^4.0.5",
     "setimmediate": "^1.0.5",
     "spectrum-colorpicker": "^1.6.2",
-    "tinymce": "4.5.6",
+    "tinymce": "4.6.5",
     "underscore": "1.8.3",
     "velocity-animate": "1.2.3"
   },