Based on https://github.com/zendframework/zend-expressive/releases/tag/3.2.0 (commit f5fdfb8c82e69761c6966986701066580d0b4ec8 in this repo)

Added
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- [zendframework/zend-expressive#637](https://github.com/zendframework/zend-expressive/pull/637) adds support for laminas/laminas-diactoros 2.0.0. You may use either
  a 1.Y or 2.Y version of that library with Mezzio applications.

Changed
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- Nothing.

Deprecated
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- Nothing.

Removed
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- Nothing.

Fixed
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- [zendframework/zend-expressive#634](https://github.com/zendframework/zend-expressive/pull/634) provides several minor performance and maintenance improvements.