Changes in version 3.1.3

• Pinned Python version to < 3.10 to avoid ImportErrors caused by a third-party
  library.
• It is now possible to re-use identifiers to cache data (#1030).
• Parts of documentation that reference API are populated with content (again)
  (#1034).
• Allow reading of datasets that do not specify chunk sizes, e.g., FIRE,
  (via updated version of xcube-cci) (#1033).
• Ensured compatibility with an announced CCI ODP API update.