Itables

**Fixed**
- Empty Polars DataFrame are now rendered correctly ([167](https://github.com/mwouts/itables/issues/167))

**Fixed**
- We have addressed the `window.initializeDataTable` is not a function error when a notebook is reloaded
([160](https://github.com/mwouts/itables/issues/160), [#163](https://github.com/mwouts/itables/issues/163)). Many thanks again to [François Wouts](https://github.com/fwouts) for providing the right fix!

**Added**
- Polars DataFrames are supported ([159](https://github.com/mwouts/itables/issues/159))
- We have added an example to show how to include images in tables ([158](https://github.com/mwouts/itables/issues/158))
- We have added links and images (flags from https://flagpedia.net) to the sample countries df ([#158](https://github.com/mwouts/itables/issues/158)).

**Changed**
- We have updated the pre-commit hooks

**Added**
- We have added a new `JavascriptCode` class to encapsulate JS Code. This will let the user set JS values for some options like `columnDefs.render` ([154](https://github.com/mwouts/itables/issues/154)).

**Fixed**
- Fixed an issue when `lengthMenu` is a 2D array ([151](https://github.com/mwouts/itables/issues/151))


**Changed**
- We make sure that no argument passed to `show` is equal to `None` (for all tested options, passing `None` results in a datatable that never loads)
- Running the test collection will not update the CSV files used for testing anymore

**Fixed**
- We have added `numpy` to the dependencies, `pytz` is an optional dependency (used in the sample dataframes only), and we do not depend on `six` anymore ([149](https://github.com/mwouts/itables/issues/149))
The build time dependencies `pathlib` and `requests` are listed in `pyproject.toml` (since [123](https://github.com/mwouts/itables/issues/123), `itables==1.4.0`)

**Changed**
- When a table is made of only a few rows, we display just the table (not the search box, pagination control, etc)