[Bug][Jupyter Widget] Hexbin fails with EnhancedColumnLayer TypeError

**Describe the bug**
Kepler fails to load an hexbin map widget with error:

`deck: error during initialisation of EnhancedColumnLayer({id: 'lifibkk-hexagon-cell'}) TypeError: Class constructor o cannot be invoked without 'new'`

**To Reproduce**
Steps to reproduce the behavior:
1. load kepler
2. Add data: `GeoDataFrame` with `hex_id` column containing H3 hashes at resolution 5,6
3. Try to load map

**Expected behavior**

An interactive map widget should be displayed. It works at resolution 5, but fails for hashes at resolution 6.

**Screenshots**
If applicable, add screenshots to help explain your problem.

**Environment (please complete the following information):**
- Python version: 3.7.7
- keplergl Widget version: 0.3.2

**Additional context**
I tried loading the same data on the [demo website](https://kepler.gl/demo) and it works.

Within Jupyter, I also converted the hashes to lat/lon points and they are correctly loaded in the expected location