Bump tinymce from 4.9.7 to 4.9.10 (#4931)

Bumps [tinymce](https://github.com/tinymce/tinymce-dist) from 4.9.7 to 4.9.10.
- [Release notes](https://github.com/tinymce/tinymce-dist/releases)
- [Changelog](https://github.com/tinymce/tinymce-dist/blob/4.9.10/changelog.txt)
- [Commits](tinymce/tinymce-dist@4.9.7...4.9.10)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -39,7 +39,7 @@
     "node-sass": "^4.13.1",
     "perfect-scrollbar": "^0.7.1",
     "select2": "^4.0.11",
-    "tinymce": "^4.9.7",
+    "tinymce": "^4.9.10",
     "toastr": "^2.1.2",
     "vue": "^2.3.4"
   }