Useful currently unused dependencies

[je-cook]

The below dependencies we do not currently use but may be useful in future when adding new functionality

section-properties, structural analysis: https://github.com/robbievanleeuwen/section-properties
fluids, Fluid dynamics component of Chemical Engineering Design Library: https://github.com/CalebBell/fluids
numdifftools, differentiation problem solving tools: https://github.com/pbrod/numdifftools