chore(deps): bump tinymce from 4.9.11 to 6.8.4

Bumps [tinymce](https://github.com/tinymce/tinymce/tree/HEAD/modules/tinymce) from 4.9.11 to 6.8.4.
- [Changelog](https://github.com/tinymce/tinymce/blob/main/modules/tinymce/CHANGELOG.md)
- [Commits](https://github.com/tinymce/tinymce/commits/tinymce@6.8.4/modules/tinymce)

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

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

package.json

@@ -76,7 +76,7 @@
     "rxjs": "^6.6.7",
     "rxjs-compat": "^6.5.5",
     "save-svg-as-png": "^1.4.17",
-    "tinymce": "^4.9.11",
+    "tinymce": "^6.8.4",
     "tslib": "^2.0.3",
     "zone.js": "~0.11.4"
   },

yarn.lock

@@ -10136,10 +10136,10 @@ thunky@^1.0.2:
   resolved "https://registry.npmjs.org/thunky/-/thunky-1.1.0.tgz"
   integrity sha512-eHY7nBftgThBqOyHGVN+l8gF0BucP09fMo0oO/Lb0w1OF80dJv+lDVpXG60WMQvkcxAkNybKsrEIE3ZtKGmPrA==
 
-tinymce@^4.9.11:
-  version "4.9.11"
-  resolved "https://registry.npmjs.org/tinymce/-/tinymce-4.9.11.tgz"
-  integrity sha512-nkSLsax+VY5DBRjMFnHFqPwTnlLEGHCco82FwJF2JNH6W+5/ClvNC1P4uhD5lXPDNiDykSHR0XJdEh7w/ICHzA==
+tinymce@^6.8.4:
+  version "6.8.4"
+  resolved "https://registry.yarnpkg.com/tinymce/-/tinymce-6.8.4.tgz#53e1313ebfe5524b24c0fa45937d51fda058632d"
+  integrity sha512-okoJyxuPv1gzASxQDNgQbnUXOdAIyoOSXcXcZZu7tiW0PSKEdf3SdASxPBupRj+64/E3elHwVRnzSdo82Emqbg==
 
 tmp-promise@^3.0.2:
   version "3.0.3"