chore(deps): update dependency tinymce to v6.7.3

Author: renovate[bot]

package.json

@@ -44,7 +44,7 @@
     "rescript-react-testing-library": "1.3.0",
     "semantic-release": "19.0.5",
     "serve-static": "1.15.0",
-    "tinymce": "6.7.2"
+    "tinymce": "6.7.3"
   },
   "repository": {
     "type": "git",