v.0.2.0

Changes in this release:

Added assert_has_only_these_calls that takes a unittest.mock and a set of calls and checks that all of those calls, and only those calls are present in the mock.

Added a length check to generate_true_false_matrix_from_namedtuple to make certain that there is at least one field in the namedtuple.

Added README.md

Updated setup.py.

Added pythonproject.toml