DeprecationWarning: inspect.getargspec() is deprecated since Python 3.0, use inspect.signature() or inspect.getfullargspec()

[README] add testing instructions

Add pytest-subtests to dev requirements This pytest plugin adds support for unittest's TestCase.subTest (for Python >= 3.4). Since we we now only support python3 and since we use a fair amount of these, let's benefit of better reporting by using this plugin.

[test] use unittest.mock instead of mock library Now that we use Python 3 only, this is possible.

Drop python2 support This mostly consists in removing the dependency on "six" and updating the code to use only Python3 idioms. Notice that we previously used TemporaryDirectory from cubicweb.devtools.testlib for compatibility with Python2. We now directly import it from tempfile.

Merge with 3.26

Remove unused imports in cubicweb.pyramid.config

Added tag 3.26.9 for changeset 4d6909de765a

[pkg] Version 3.26.9

[pyramid/security] use cryptographically secure random generator Based on django source code in case SystemRandom is not available. According to python documentation: https://docs.python.org/2/library/random.html > Warning > The pseudo-random generators of this module should not be used for security > purposes. Use os.urandom() or SystemRandom if you require a cryptographically > secure pseudo-random number generator.