Sass & Class Renames (#759)

* - add autoprefixer
- add cssnano
- add postcss-loader
- remove unused packages

* create RTL scss module

* add vs__ prefix to open-indicator, extract to module

* module for dropdown-toggle

* vs__clear module

* vs__dropdown-menu module

* rename `selected-tag` to `vs__selected`

* remove rtl class

* remove dropdown class

* search-input scss module

* move animations to global module

* refactor dropdown list items

* - spinner slot is now scoped with `loading` variable
- move spinner to scss module

* apply vs__search class directly to search input: if you're using the slot, you might not want default styles

* finish global modules

* make RTL a component state

* - update component states to use vs-- prefix
- rename dropdownClasses to stateClasses

* remove unused property

* Closes #760

* fix states

* more state fixes

* rename .close to vs__deselect

* - simplify dev.html
- start on 'sandbox' development

* update build

* - update webpack config
- move Sandbox to VuePress folder

* update external framework version links

* assign grid areas, ensure 100% height outside of docs

* limit specificity

* first pass at assigning variables

* assign 'darkest'

* remove max-height prop

* rename 'component' variables to 'state'

* update badges

* add deprecation notice to docs

* bump travis config

* add coveralls coverage reporter

* bump netlify config

* additional pass pulling up to variables

* start converting to SVG icons

* middle align action icons

* update netlify config

* netlify bump

* fix travis

* fix travis

* try lcov

* netlify attempt

* prune old packages

* bump travis config

docs/api/props.md

@@ -50,6 +50,11 @@ clearable: {
 
 ## maxHeight
 
+::: warning Deprecated in `v2.x` & Removed in `v3.0`
+This prop was removed in `v3.0`. You can use the `$vs-dropdown-max-height`
+SCSS variable to adjust this setting in `v3.x`.
+:::
+
 Sets the max-height property on the dropdown list.
 
 ```js