Do not use mutable arguments in pynamo models

See changelog for release notes.

Fix setup.py release version for pypi release

4.3.1

Fix version in setup.py to release 4.3.1 (#183)

Case insensitive sorting for credential and service list returns

This release is a minor feature release. Returns for credential and service lists are sorted in a case-insensitive way, so that the UI has the lists sorted correctly.

4.1.0

Merge pull request #173 from lyft/bump_version

v4.1.0

4.0.0

4.0.0: pynamo==3.2.1 boolean migration (#170)

3.0.0

NonNullUnicodeSetAttribute for blind cred and script upgrades (#166)

2.0.1

[2.0.1] Added fixes to the migration scripts (#168)