Update project dropzone.js to v3.12.0

libgrabber updated project dropzone.js to v3.12.0.

@enyo

### Metadata information

```json
{
  "metadata": {
    "packageManager": "github",
    "name": "dropzone.js",
    "repo": "enyo/dropzone",
    "files": {
      "basePath": "downloads/",
      "exclude": ["readme.md", "css/stylus/*"],
      "include": ["**/*"]
    },
    "path": "/home/jsdelivr/files/dropzone",
    "localVersions": ["3.10.2", "3.11.1", "3.11.2"],
    "remoteVersions": ["v0.1.1", "v0.1.2", "v0.1.3", "v0.1.4", "v0.1.5", "v0.2.0", "v0.2.1", "v0.2.2", "v0.2.3", "v0.2.4", "v0.2.5", "v0.3.0", "v0.3.1", "v1.0.0", "v1.1.0", "v1.2.0", "v1.2.1", "v1.2.2", "v1.2.3", "v1.2.4", "v1.2.5", "v1.2.6", "v1.3.0", "v1.3.1", "v1.3.2", "v1.3.3", "v1.3.4", "v1.3.5", "v1.3.6", "v1.3.7", "v1.3.8", "v1.3.9", "v1.3.10", "v1.3.11", "v1.3.12", "v2.0.0", "v2.0.1", "v2.0.2", "v2.0.3", "v2.0.4", "v2.0.5", "v2.0.6", "v2.0.7", "v2.0.8", "v2.0.9", "v2.0.10", "v2.0.11", "v2.0.12", "v2.0.13", "v2.0.14", "v2.0.15", "v2.0.16", "v3.0.0", "v3.0.1", "v3.1.0", "v3.2.0", "v3.3.0", "v3.4.0", "v3.4.1", "v3.5.0", "v3.5.1", "v3.5.2", "v3.5.3", "v3.6.0", "v3.6.1", "v3.6.2", "v3.7.0", "v3.7.1", "v3.7.2", "v3.7.3", "v3.7.4", "v3.8.0", "v3.8.1", "v3.8.2", "v3.8.3", "v3.8.4", "v3.8.5", "v3.8.6", "v3.8.7", "v3.9.0", "v3.10.0", "v3.10.1", "v3.10.2", "v3.11.0", "v3.11.1", "v3.11.2", "v3.11.3", "v3.12.0"],
    "branchVersions": []
  },
  "version": "v3.12.0",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/dropzone/3.12.0",
  "branch": "dropzone.js/v3.12.0"
}
```