v1.4.0

ChangeLog summary:

• OrderSummary component family has been added (ported from peacock & known bugs fixed)
• New simplified output format for classnames [backward incompatible change]
• Added optional renderer property for FilterGroup component
• Added initiallyExpanded property for FilterGroup component

Also prettier was added for code formatting. There is two additions to dev environment:

1. make fmt command re-formats via prettier all source code inside `src directory.
2. husky & lint-staged packages have been added in order to automatically re-format code in precommit git hook.