Change __all__ to tuples

[white-gecko]

To prevent the warning:

WARNING: all is defined as a list, this means pydocstyle cannot reliably detect contents of the all variable, because it can be mutated. Change all to be an (immutable) tuple, to remove this warning. Note, pydocstyle uses all to detect which definitions are public, to warn if public definitions are missing docstrings. If all is a (mutable) list, pydocstyle cannot reliably assume its contents. pydocstyle will proceed assuming all is not mutated.

the __all__ "variables" are changed to tuples.

[coveralls]

Coverage remained the same at 60.352% when pulling 61cc15d on feature/__all__Tuples into cf12453 on feature/provenance.

[coveralls]

Coverage remained the same at 60.352% when pulling 61cc15d on feature/__all__Tuples into cf12453 on feature/provenance.