v4.4.0

This relatively straightforward release adds a selection of new listeners to the Store object, and their respective hooks. These are for listening to changes in the 'existence' of entities rather than to their value. For example, the addHasTableListener method will let you listen for the presence (or not) of a specific table.

The full set of new existence-listening methods and hooks to work with this is as follows:

Existence of:	Add Listener	Hook	Add Listener Hook
Tables	addHasTablesListener	useHasTables	useHasTablesListener
A Table	addHasTableListener	useHasTable	useHasTableListener
A Table	Cell addHasTableCellListener	useHasTableCell	useHasTableCellListener
A Row	addHasRowListener	useHasRow	useHasRowListener
A Cell	addHasCellListener	useHasCell	useHasCellListener
Values	addHasValuesListener	useHasValues	useHasValuesListener
A Value	addHasValueListener	useHasValue	useHasValueListener

These methods may become particularly important in future versions of TinyBase that support null as valid Cell and Value content.