0.4:
* Add support for assertDictContainsSubset.
* Put parenthesis around expressions if required.
* Fixed assertRaisesRegex, assertRaisesRegexp and assertWarnsRegex.
The regex was getting replaced with an undefined variable pattern.
* Fix assertRaisesRegex and assertRaisesRegexp with **kwargs and
atom parameters.
* Made assertRaisesRegex, assertRaisesRegexp and assertWarnsRegex use
the match kwarg in pytest.raises instead of creating a variable
with the context manager and doing an assert on re.search.
* Add a short developer guide.
* Remove testing on Python 3.0, 3.1, 3.2, add 3.6 and 3.7.
* Distribute package as a universal wheel.
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