## Release summary
This release makes numerous improvements and changes to the package. All of the functions have been refactored to reduce the number of dependencies, documentation has been improved, and new functionality has been added to work with breaks and legends. One function, bi_pal_manual(), has been deprecated and now returns a warning using .Deprecated() that it will be removed in a later version. I have kept breaking changes to a minimum - the package requires R 3.5 now, and there has been a change to bi_class() that will impact users. Both changes have been flagged in the package documentation.

## Test environments
* local OS X install: R 4.1.2
* Linux ubuntu distribution (via GitHub Actions): R-devel, R-release, past four R-oldrel (4.1.3, 4.0.5, 3.6.3, 3.5.3)
* macOS (via GitHub Actions): R-release
* windows (on Appveyor): R-release
* winbuilder, R-release, R-oldrel, R-devel

* r-hub not used because it lacks dependencies needed to build `sf` on Debian

## R CMD check results
There were no ERRORs, WARNINGs, or NOTEs with local or CI checks. There is one NOTE on winbuilder:

```r
* checking CRAN incoming feasibility ... NOTE
Maintainer: 'Christopher Prener <chris.prener@gmail.com>'

New maintainer:
  Christopher Prener <chris.prener@gmail.com>
Old maintainer(s):
  Christopher Prener <chris.prener@slu.edu>
```

I am still the maintainer - I have just changed my contact information due to new employment!

## Reverse dependencies
Not applicable.
