Bump tinymce from 5.10.3 to 6.0.3

Bumps [tinymce](https://github.com/tinymce/tinymce/tree/HEAD/modules/tinymce) from 5.10.3 to 6.0.3.
- [Release notes](https://github.com/tinymce/tinymce/releases)
- [Changelog](https://github.com/tinymce/tinymce/blob/develop/modules/tinymce/CHANGELOG.md)
- [Commits](https://github.com/tinymce/tinymce/commits/6.0.3/modules/tinymce)

---
updated-dependencies:
- dependency-name: tinymce
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package-lock.json

         "select2": "4.0.13",
         "select2-bootstrap-theme": "0.1.0-beta.10",
         "tempusdominus-bootstrap-4": "^5.39.0",
-        "tinymce": "^5.10.3"
+        "tinymce": "^6.0.3"
       }
     },
     "node_modules/@babel/code-frame": {
       }
     },
     "node_modules/tinymce": {
-      "version": "5.10.3",
-      "resolved": "https://registry.npmjs.org/tinymce/-/tinymce-5.10.3.tgz",
-      "integrity": "sha512-O59ssHNnujWvSk5Gt8hIGrdNCMKVWVQv9F8siAgLTRgTh0t3NDHrP1UlLtCxArUi9DPWZvlBeUz8D5fJTu7vnA==",
+      "version": "6.0.3",
+      "resolved": "https://registry.npmjs.org/tinymce/-/tinymce-6.0.3.tgz",
+      "integrity": "sha512-4cu80kWF7nRGhviE10poZtjTkl3jNL+lycilCMfdm3KU5V7FtiQQrKbEo6GInXT05RY78Ha/NFP0gOBELcSpfg==",
       "dev": true
     },
     "node_modules/to-absolute-glob": {
       }
     },
     "tinymce": {
-      "version": "5.10.3",
-      "resolved": "https://registry.npmjs.org/tinymce/-/tinymce-5.10.3.tgz",
-      "integrity": "sha512-O59ssHNnujWvSk5Gt8hIGrdNCMKVWVQv9F8siAgLTRgTh0t3NDHrP1UlLtCxArUi9DPWZvlBeUz8D5fJTu7vnA==",
+      "version": "6.0.3",
+      "resolved": "https://registry.npmjs.org/tinymce/-/tinymce-6.0.3.tgz",
+      "integrity": "sha512-4cu80kWF7nRGhviE10poZtjTkl3jNL+lycilCMfdm3KU5V7FtiQQrKbEo6GInXT05RY78Ha/NFP0gOBELcSpfg==",
       "dev": true
     },
     "to-absolute-glob": {

package.json

     "select2": "4.0.13",
     "select2-bootstrap-theme": "0.1.0-beta.10",
     "tempusdominus-bootstrap-4": "^5.39.0",
-    "tinymce": "^5.10.3"
+    "tinymce": "^6.0.3"
   },
   "scripts": {
     "build": "gulp copy && gulp scss",