3.0.0

Changes

• TS support
• Added full-sized containers for top and bottom
• Changed SASS style to match BEM - breaking change
• Limit center containers to 350px
• Allow dynamic expansion of containers based on each notification's width
• Adedd new API call removeAllNotifications
• Removed prop-types package, props are now defaulted internally

Fixes

• #82, #69, #67, #65, #63, #61