Dependency conflict with protobuf and grpcio-reflection

[BSchilperoort]

Pinning protobuf to version 3 seems to cause a dependency conflict with grpcio-reflection. Separately installing a previous version (grpcio-reflection==1.48.2) seems to solve the problem.

Full error message:

Failed to build grpc4bmi
ERROR: grpcio-reflection 1.50.0 has requirement protobuf>=4.21.6, but you'll have protobuf 3.20.3 which is incompatible.
Installing collected packages: basic-modeling-interface, websocket-client, urllib3, idna, certifi, charset-normalizer, requests, pyparsing, packaging, docker, six, grpcio, protobuf, grpcio-reflection, numpy, typeguard, grpc4bmi
    Running setup.py install for grpc4bmi ... done
Successfully installed basic-modeling-interface-0.2 certifi-2022.9.24 charset-normalizer-2.1.1 docker-6.0.1 grpc4bmi-0.2.15 grpcio-1.50.0 grpcio-reflection-1.50.0 idna-3.4 numpy-1.23.4 packaging-21.3 protobuf-3.20.3 pyparsing-3.0.9 requests-2.28.1 six-1.16.0 typeguard-2.13.3 urllib3-1.26.12 websocket-client-1.4.2

Related to #115

[sverhoeven]

In #126, protobuf is pinned to 4 and grpcio-reflection is unpinned which causes no conflict at the moment.