v0.28.1

Implementation changes

• Set default variable state to Unspecified (#4738)

Dependencies

• Update dependency range for api-core to include v1.0.0 releases (#4944)

Documentation

• Fixing "Fore" -> "For" typo in README docs. (#4317)

Testing and internal changes

• Install local dependencies when running lint (#4936)
• Re-enable lint for tests, remove usage of pylint (#4921)
• Normalize all setup.py files (#4909)
• Making a nox -s default session for all packages. (#4324)
• Shorten test names (#4321)