Patch for React >=6.3 to release v3.0.0

Switch to yarn for dependencies management
Refactor config files for webpack, eslint,...
Update and deduplicate yarn dependencies
Add EditorConfig file to maintain coding styles
Remove unnecessary dependency babel-register
Remove unused definition react-addons-transition-group from webpack config
Fix all eslint errors for the source-code and unit-tests
Fix reloading error for docs site when running with webpack-dev-server
Correct Footer styles, Nav links for docs site
Reformat source-code with prettier
Update dependencies and unit-tests for react version ^16.3
Resolve unhandled rejections for all unit-tests
Update webpack to v2 to make docs site work with dev-server
Rename unsafe lifecycle methods with prefix UNSAFE_
Update eslint dependencies to fix hidden issues
Refactor docs source-code to functional-components
Fix incorrect Prism highlights by updating that library
Speedup Prism with async property
Fix router-rendering issue for NotFound page
Optimize examples with common SubmitResult component
Do not validate inputs when mounting to fix error shown after focus/blur only
Add option validateOnSubmitOnly to AvForm to validate after the first submit only
Bump version to 3.0.0 for release

Availity / availity-reactstrap-validation