* Refactored extra environment marker processing in WorkingSet. * Issue 533: Fixed intermittent test failures. * Issue 536: In msvc9_support, trap additional exceptions that might occur when importing ``distutils.msvc9compiler`` in mingw environments. * Issue 537: Provide better context when package metadata fails to decode in UTF-8.
20.6.8
Not secure
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* Issue 523: Restored support for environment markers, now honoring 'extra' environment markers.
20.6.7
Not secure
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* Issue 523: Disabled support for environment markers introduced in v20.5.
20.6.6
Not secure
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* Issue 503: Restore support for PEP 345 environment markers by updating to Packaging 16.6.
20.6.0
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* New release process that relies on `bumpversion <https://github.com/peritus/bumpversion>`_ and Travis CI for continuous deployment. * Project versioning semantics now follow `semver <https://semver.org>`_ precisely. The 'v' prefix on version numbers now also allows version numbers to be referenced in the changelog, e.g. http://setuptools.pypa.io/en/latest/history.html#v20-6-0.
20.5
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* BB Pull Request 185, 470: Add support for environment markers in requirements in install_requires, setup_requires, tests_require as well as adding a test for the existing extra_requires machinery.