* allow __suppress_context__ to be mutated on frozen exceptions
* add changelog
* and __notes__! lets' not forget that.
* add notes to news
* add tests
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
* fix improt
* fix test
* fix tests again
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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Thomas Grainger