Bump tinymce from 4.5.7 to 5.10.7

Bumps [tinymce](https://github.com/tinymce/tinymce/tree/HEAD/modules/tinymce) from 4.5.7 to 5.10.7.
- [Release notes](https://github.com/tinymce/tinymce/releases)
- [Changelog](https://github.com/tinymce/tinymce/blob/5.10.7/modules/tinymce/CHANGELOG.md)
- [Commits](https://github.com/tinymce/tinymce/commits/5.10.7/modules/tinymce)

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

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

Author: dependabot[bot]

package-lock.json

@@ -76,7 +76,7 @@
     "rxjs-compat": "6.3.0",
     "socicon": "3.0.5",
     "style-loader": "^1.1.3",
-    "tinymce": "4.5.7",
+    "tinymce": "5.10.7",
     "tslib": "^2.3.1",
     "typeface-exo": "0.0.22",
     "web-animations-js": "^2.3.2",