Fix measurement parsing

This release fixes measurement parsing. (All lists should rather be ndarray instances.)

Full Changelog: v0.8.4...v0.8.5

sha1sum results:
6684bc8e184158150d47aed0f825f5b23de95e65 cirqqrack-0.8.5-py3-none-any.whl
bb7145b1811810397ae05355a0ee73ac2f09e055 cirqqrack-0.8.5.tar.gz