Missingno

Fixes incompatibility with new versions of `matplotlib` (https://github.com/ResidentMario/missingno/pull/162).

This is a maintenance release of `missingno`. The only user-facing change is the addition of the `label_rotation` parameter (153).

This is a maintenance release of `missingno`. The primary user-facing change is that the long-deprecated `geoplot` method and `inline` parameter have been removed.

This incremental release adds a minor feature and deprecates certain outdated functionality.

* An `ax` parameter has been added to all plot types. Pass a `matplotlib` `Axes` object to this parameter to add the plot to a subplots or gridspec object (see 83). Note that the `matrix` plot does not support the `sparkline` parameter in this configuration.
* The behavior of the `sort` parameter has changed. It has been removed from `dendrogram` and `geoplot`, where it did not do anything. `bar` will now use the `sort` parameter to order its markers (previously it had no effect on the plot output). The behavior of the `sort` parameter on `matrix` is unchanged.
* The `inline` parameter has been deprecated and will be removed in a future version of `missingno`.
* The `geoplot` function has been deprecated and will be removed in a future version of `missingno`. To replicate this functionality, see [this recipe](https://residentmario.github.io/geoplot/gallery/plot_san_francisco_trees.html) in the `geoplot` package documentation.

- Fixes 14, 6.
- Adds a new `msno.bar` plot type.
- Adds a new `msno.geoplot` plot type.
- Adds a new `freq` argument to the `msno.matrix` plot type ([VolkrB](https://github.com/VolkrB)).