v1.2.0

[1.2.0] - 2026-10-14

Added

• Support for Python 3.15.
• CodSpeed benchmark suite (tests/benchmarks/) covering parsing
  (measurements, locations, sensors, latest) and serialization (.json() with
  stdlib/orjson, .dict()).

Changed

• Annotated OpenAQ.__enter__ and Headers.copy with typing.Self so type
  checkers infer the correct return type for subclasses. Also removed
  from __future__ import annotations from client.py and transport.py.
• Faster response parsing and serialization. read_response(), .json() and
  .dict() now do less work per call. Field-name mappings, header field names
  and each response class's result type are worked out once and cached, and
  nested data is no longer rebuilt in multiple times. The output of .json()
  and .dict() is unchanged.
• .json() now builds camelCase output in a single pass over the model
  instead of calling .dict() and then renaming keys in a second pass.
• .dict() no longer uses dataclasses.asdict(). It still uses snake_case
  field names and keeps the same field order and types as before.

Removed

• Support for Python 3.10. The minimum supported version is now 3.11.
• Private _ResponseBase._serialize() method.

Fixed

• Passing a time-zone-aware datetime_from without a datetime_to no longer
  raises TypeError.
• Passing one time-zone-aware and one naive datetime for datetime_from and
  datetime_to now raises a clear InvalidParameterError instead of a
  TypeError.

Security

• Pinned slackapi/slack-github-action to a commit SHA and upgraded it from
  v2.0.0 to v4.0.0.