Features / Improvements
- `tfq.layers.Unitary` Keras layer added.
- `tfq.calculate_unitary` op added.
- support for `cirq.I` in all graph operations.
- Performance improvements for `tfq.layers.SampledExpectation`.
- Added `sampled_expectation` C++ op.
- Upgraded Cirq from 0.7 to 0.8 (Possibly breaking)
Bug Fixes
- removed (hopefully) all incorrect autographer warnings.
- Fixed issues with op parallelization on Windows.
- Fixed tf.function performance issues for certain layer configurations of `tfq.layers.State`.
- Fixed precision issue when simulating > 10 qubits with certain layouts.