Update editor to 1.13.0

docs/release-notes-editor.txt

 Editor
 ======
+1.13.0
  - Remove underlinable option for text
  - Offer a choice of colors for marking text
-
+ - Fix text element with background color and font color at the same time
+ - Add proper label to textarea and reduce vertical space around text
+ - Add 30px default bottom-margin to likert and radio
+ - Rework dropList items to have an ID and allow images references
+   To use images a text option has to be created like before. The image
+   can be set afterwards. When an option has both a text and an image, the
+   text is ignored and the image is shown.
+ - Improve ID-Service to free up IDs when elements are deleted
 
 1.12.0
  - Add new element cloze ("Lückentext")

package.json

@@ -2,7 +2,7 @@
   "name": "verona-modules-aspect",
   "config": {
     "player_version": "1.6.0",
-    "editor_version": "1.12.0"
+    "editor_version": "1.13.0"
   },
   "scripts": {
     "ng": "ng",