Remove optionality from nucypher-core::Conditions usage #293
Description
Replace a workaround with updated Conditions from nucypher/nucypher-core#80:
- https://github.com/nucypher/nucypher-ts/pull/286/files#diff-dd5e0c89a877bca68067d6b61570604ff5b9128b5c17aaf176252d7846243f88R154-R156
- https://github.com/nucypher/nucypher-ts/pull/286/files/dcc741b78db143ee77d0868d644434b611581a4d#diff-dd5e0c89a877bca68067d6b61570604ff5b9128b5c17aaf176252d7846243f88R39