Styling fixes for height and z-index applied to spaces

• Fixed generation of head styles height and z-index which were missing a semi-colon.

Added Custom space and improved resize event functionality

• Added Custom space to allow access to all space properties.
• Allowed false to be returned from onResizeStart event callback to conditionally cancel resize operation.

Added mouse/touch events to spaces

• Added onMouseMove, onTouchStart, onTouchMove and onTouchEnd events.

Cleaner markup with less inline styling and miscellaneous bug fixes/optimisations

• Moved child state and recalculation of child spaces to the parent space to remove synchronisation issues causing various update issues.
• Moved space styles to document head to generate cleaner mark-up. All spaces now get a auto-generated short ID which can be overriden with the id property on a space.
• Removed the need for an outer and inner container on all spaces except for when a space is resizable and scrollable to allow the space to maintain the resize handle location.
• Optimised touch resize actions preventing default browser actions using css touch-action and changing debounce to throttling on resize updates.

Ensure spaces kept in sync with zIndex changes

• Fix to ensure spaces in same parent are updated when a space zIndex is adjusted.

Added resize events and various bug fixes

• Added resize start and end events
• Fixed useContext hook being used within condition expression causing 'React has detected a change in the order of Hooks called by SpaceInternal' error when zIndex property updated on space.
• Fix to ensure debounced resize (mouse/touch) events do not fire after mouse up or touch end events have fired.
• Fix to ensure mouse up and touch end events are unbound after a resize operation has completed to prevent multiple event handlers being bound on every resize operation.

Added proptypes validation to components + bug fixes

• Fix to ensured resize delta is reset when size property changed on anchored and resizable spaces
• Added PropTypes for all exposed components for Javascript only consumers in addition to the Typescript typings in the library.
• Fix when multiple classes provided as property to space to prevent a duplication of class names on the outer and inner space elements.

Touch resize functionality

• Added touch resize functionality.
• Remove old docs from demo project.

Layered spaces implementation

• Added component and layer support to allow floating of spaces above each other.

Migrated from webpack to rollup for library build

• Migrated from Webpack to Rollup for building component library
• Created ES module bundles in /dist/es
• Fixed window undefined error when rendering spaces via Next.js
• Created server bundle /dist/server for using with Node.js server side apps when utilising SSR, e.g. Next.js and separated styling from server bundle (/dist/server.css). This is currently experimental.