build(deps): bump tinymce from 4.9.11 to 6.0.2

Bumps [tinymce](https://github.com/tinymce/tinymce/tree/HEAD/modules/tinymce) from 4.9.11 to 6.0.2.
- [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/6.0.2/modules/tinymce)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -27,7 +27,7 @@
 		"popper.js": "^1.16.1",
 		"select2": "github:woocommerce/selectWoo#1.0.5",
 		"sidr": "^2.2.1",
-		"tinymce": "^4.9.11",
+		"tinymce": "^6.0.2",
 		"wp-admin-colors": "^5.9.0"
 	},
 	"devDependencies": {