* fix(reboot): revert hr styles to v4 implementation
* docs(cheatsheet): add a hr example
* fix(reboot): currentColor is the initial border-color value
* Document hr element in Reboot docs
* Update migration guide
* Update scss/_variables.scss
Co-authored-by: Mark Otto <markd.otto@gmail.com>
* Separate container classes from enable-grid-classes optoin
* Document the new option
* Mention in migration guide
Co-authored-by: XhmikosR <xhmikosr@gmail.com>