UserWarning:  The dash_core_components package is deprecated.

If you use dash-slicer with the current plotly.version, you get the following warning:

```
UserWarning: 
The dash_html_components package is deprecated. Please replace
`import dash_html_components as html` with `from dash import html`
  import dash_html_components as html

```
Therefore, it would be important to adjust the imports accordingly.