Bump tinymce from 5.10.7 to 5.10.9

Bumps [tinymce](https://github.com/tinymce/tinymce/tree/HEAD/modules/tinymce) from 5.10.7 to 5.10.9.
- [Changelog](https://github.com/tinymce/tinymce/blob/5.10.9/modules/tinymce/CHANGELOG.md)
- [Commits](https://github.com/tinymce/tinymce/commits/5.10.9/modules/tinymce)

---
updated-dependencies:
- dependency-name: tinymce
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -24,7 +24,7 @@
     "popper.js": "^1.16.1",
     "select2": "4.1.0-rc.0",
     "skinview3d": "^3.0.0-alpha.1",
-    "tinymce": "5.10.7"
+    "tinymce": "5.10.9"
   },
   "scripts": {
     "postinstall": "node ./dev/scripts/postinstall.js"