Inform

- Change *strip_nl* keys for *dedent()*.
- Added *include_codicil* argument to *Error.render()*.

- Use critical urgency by default with notifier if message is an error.
- Ignore *BrokenPipeError*.
- Add *full_width* argument to *render_bar*().
- Require secondary arguments to *Color* be keyword arguments.
- Require secondary arguments to *plural* be keyword arguments.
- Add *max_col_width* parameter to *columns*().
- Added type hints.

- Add markers to *ProgressBar*.
- Change order of arguments to *dedent*.
- Drop support for Python 2.

- Added *dedent()*.
- Added *LoggingCache*.

- Allow culprits to be falsy.

- Defer evaluation of *stdout* and *stderr*.