v4.0.0-alpha.9

• fix(resource): scoped data for head-resources slot
• fix(resource): data for interval-label slot
• fix(resource): incorrect usage of interval-label slot
• fix(resource): drag and drop on 'resource interval'
• fix(resource): scoped data for 'head-resources', 'resource-label', 'resource-intervals' and 'resource-interval'
• fix(resource): should use cell-width prop instead of interval-header-width to be consistent with other calendars
• feat(ui): add 'time' as a focus-type
• fix(ui): remove z-index on focus helper to avoid sticky issues
• fix(resource): add missing css class for resource--interval
• feat(resource): add support for hoverable and focusable