Torch and Lightning 2.0.0

[kylebgorman]

The library does not work with Lightning (and one suspects that Torch itself is also an issue) > 2.0.0. The first issue I encounter when running yoyodyne-train with no arguments is related to a change in how Lightning command-line arguments are handled---I suspect there are at least a few more.

So that the library is not broken at head---which I consider unacceptable---I have pinned as follows:

pytorch-lightning>=1.7.0,<2.0.0
torch>=1.11.0,<2.0.0

What we need to do is just to migrate to 2.0.0, by fixing Lightning (and Torch, if any) bugs until things work, and then re-pin these two dependencies >=2.0.0. I have initially assigned myself, but I would welcome help.