Pin python-rapidjson in cirq-rigetti. (#5666)
Pin python-rapidjson in cirq-rigetti. (#5666)

Should fix CI breaks on mac. Matches rapidjson used here: https://github.com/rigetti/pyquil/blob/v3.0.0/poetry.lock
quantumlib/Cirq,quantumlib/Cirq,quantumlib/Cirq,quantumlib/Cirq,quantumlib/Cirq