Some dependencies are breaking compatibility with other packages

[weymouth]

ForwardDiff has gone to v1.0, and we've limited to v.0.10.8. Should we upgrade this one?

#133 Added package Random.jl fixed to version v1.11 which breaks compat with ParametricBodies.jl and other packages that use WaterLily and Random in tests. We could downgrade the level, but looking at the code I think the symtypes(sym) function (which is the only function using Random) should be replaced with @gensym. @b-fg, is there a reason not to use the build-in generator?

[b-fg]

Not really. I think I tried it and was having some problems, so I switched to use a random string generator. I can try again now that we have a working version.

[b-fg]

Feel free to push an update regarding the ForwardDiff dependency.