pip downstream dependency version mismatch

[nnaka]

When trying to install SpawnNet in order to train the model, we see a mismatch between the version of hydra-core and omegaconf required by SpawnNet dependencies RLAfford and r3m which require hydra-core==0.11.3 and 'hydra-core>=1.1.1' as well as omegaconf 1.4.1 and omegaconf>=2.1.1 respectively.