BUG: Styler copy methods not updated for recent additions

[attack68]

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of pandas.

• (optional) I have confirmed this bug exists on the master branch of pandas.

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Recent additions (1.2.0) (1.3.0) to Styler have introduced additional class attributes.

The existing copy mechanisms catered for older attributes (although not all), but now needs to be reviewed.
Tests should probably be added.

def _copy(self, deepcopy: bool = False) -> Styler:
        styler = Styler(
            self.data,
            precision=self.precision,
            caption=self.caption,
            uuid=self.uuid,
            table_styles=self.table_styles,
            na_rep=self.na_rep,
        )
        if deepcopy:
            styler.ctx = copy.deepcopy(self.ctx)
            styler._todo = copy.deepcopy(self._todo)
        else:
            styler.ctx = self.ctx
            styler._todo = self._todo
        return styler

And it might also be worth reviewing the export and use styles methods in case something has been missed.

[rlukevie]

take