- update to 2.3.2:
  * Fixed issue where a `ns_provider` could be passed `None`
    instead of its correct `cmd2.Cmd` or `CommandSet` value.
  * Fixed issue introduced in 2.3.0 with `AlternatingTable`, `BorderedTable`, and `SimpleTable` that caused
    header alignment settings to be overridden by data alignment settings.
  * `CompletionItems` now saves the original object from which it creates a string.
  * Using `CompletionItems` as argparse choices is fully supported.
  * `ArgparseCompleter` now does the following if a list of `CompletionItems`
    was created with numerical types:
  * Fixed `AttributeError` in `rl_get_prompt()` when prompt is `None`.
  * Fixed bug where using choices on a Settable didn't verify that a valid choice had been entered.
  * Fixed bug introduced in cmd2 2.0.0 in which `select()` converts return values to strings.
  * Added settings to Column class which prevent a table from overriding existing styles in header
    and/or data text. This allows for things like nesting an AlternatingTable in another AlternatingTable.
  * AlternatingTable no longer automatically applies background color to borders. This was done to improve
    appearance since the background color extended beyond the borders of the table.
  * Added ability to colorize all aspects of `AlternatingTable`, `BorderedTable`, and `SimpleTable`.
  * Added support for 8-bit/256-colors with the `cmd2.EightBitFg` and `cmd2.EightBitBg` classes.
  * Added support for 24-bit/RGB colors with the `cmd2.RgbFg` and `cmd2.RgbBg` classes.
  * Removed dependency on colorama.
  * Changed type of `ansi.allow_style` from a string to an `ansi.AllowStyle` Enum class.
  * To support the color upgrade, all cmd2 colors now inherit from either `ansi.FgColor` or `ansi.BgColor`.
    Therefore, `ansi.style()` no longer accepts colors as strings.

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