The list of changes to apply to all records in a list. All operations with
text are case insensitive, so if you, e.g., try to replace a project
projectone to ProjectOne no todo is updated
The new value for a date-like tag.
Date - a fixed date, one for all tasks
Expr - an expression that is calculated for each of selected tasks. E.g, due+1w
Returns if the tag needs special processing. All ‘special’ tags cannot be
changed via ‘update_tags’ function because they usually requires running
some extra operations on the data after a change (e.g, update internal
fields in addition to updating the tag HashMap).