Release v0.15.0

• Added: audformat.MiscTable
  which can store data
  not associated with media files
• Added: store scheme labels in a misc table
• Added: dictionary audformat.Database.misc_tables
  holding misc tables of a database
• Added: audformat.utils.difference()
  for finding index entries
  that are only part of a single index
  for a given sequence of indices
• Added: audformat.utils.is_index_alike()
  for checking if a sequence of indices
  has the same number of levels,
  level names,
  and matching dtypes
• Added: audformat.define.DataType.OBJECT
• Added: audformat.utils.set_index_dtypes()
  to change dtypes of an index
• Added: audformat.testing.add_misc_table()
• Added: audformat.Database.__iter__
  iterates through all (misc) tables,
  e.g. a user can do list(db)
  to get a list of all (misc) tables
• Changed: audformat.Database.update()
  can now join schemes
  with different labels
• Changed: audformat.utils.union(),
  audformat.utils.intersect(),
  and audformat.utils.concat()
  now support any kind of index
• Changed: audformat.utils.intersect()
  no longer removes segments
  from a segmented index
  that are contained
  in a filewise index
• Changed: require pandas>=1.4.1
• Changed: use pandas dtype 'string'
  instead of 'object'
  for storing audformat dtype 'str' entries
• Changed: use a misc table
  to store the 'speaker' scheme labels
  in the emodb example
  in the documentation
• Changed: audformat.utils.join_labels()
  raises ValueError
  if labels are of different dtype
• Fixed: ensure column IDs are different from index level names
• Fixed: make sure
  audformat.Column.set()
  converts data to dtype of scheme
  before checking if values are in min-max-range
  of scheme
• Fixed: links to pandas API in the documentation
• Fixed: include methods
  to_dict(),
  from_dict(),
  dump(),
  and attributes
  description,
  meta
  in the documentation for the classes
  audformat.Column,
  audformat.Database,
  audformat.Media,
  audformat.Rater,
  audformat.Scheme,
  audformat.Split,
  audformat.Table
• Fixed: type hint of argument dtype
  in the documentation of audformat.Scheme
• Removed: support for Python 3.7