Bump dropzone from 5.5.1 to 5.7.0

Bumps [dropzone](https://gitlab.com/meno/dropzone) from 5.5.1 to 5.7.0.
- [Release notes](https://gitlab.com/meno/dropzone/tags)
- [Changelog](https://gitlab.com/meno/dropzone/blob/master/CHANGELOG.md)
- [Commits](https://gitlab.com/meno/dropzone/commits/v5.7.0)

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

package.json

@@ -46,7 +46,7 @@
     "co-views": "~2.1.0",
     "copy-webpack-plugin": "^5.1.1",
     "debug": "~4.1.1",
-    "dropzone": "~5.5.1",
+    "dropzone": "~5.7.0",
     "ejs": "^3.0.1",
     "form-data": "^3.0.0",
     "http-errors": "^1.7.3",