[Bug] initialize kepler demo-app with DuckDB plugin cause error on `_loadSampleData`

[abdulrehmanch]

Describe the bug When I initialize the demo-app with duckdb and uncomment the _loadPointData(); function under the _loadSampleData() function. there error is

Dataset error: Failed to create a new dataset: Error: Catalog Error: Type with name undefined does not exist! Did you mean "union"?

To Reproduce Steps to reproduce the behavior:

1. Go to examples/demo-app/src/reducers/index.js
2. Line number 32, uncomment Initialize with duckdb
3. run the app
4. See error on loading data

Expected behavior I want to load sampe points on application startup. without duckdb it is working fine but when I enable duckdb it gives me above error.

[igorDykhta]

I'll export the utilities to add proper native DuckDB types to fields in version 3.9.10.