Use Pandas 2.0

[Zaharid]

I tried updating to pandas 2.0. So far I have seen an error here:

nnpdf/validphys2/src/validphys/tableloader.py

Line 84 in b5ee4ba

def set_actual_column_level0(df, new_levels):

Prescient docstring.

    def set_actual_column_level0(df, new_levels):
        """Set the first level of the index to new_levels. Note:
        This is a separate function mostly because it breaks
        in every patch update of pandas."""
        cols = df.columns
>       cols.set_levels(new_levels, inplace=True, level=0)
E       TypeError: MultiIndex.set_levels() got an unexpected keyword argument 'inplace'