Added JS-PyTorch

[eduardoleao052]

Checklist:

• [x] I've read and understood Contributing Guidelines.
• [x] I've added the new resource at the end of its section.
• [x] This resource is out there for a while, and actively maintained.
• [x] This resource is popular enough and has at least a few hundred stars on GitHub.

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JS-PyTorch is a Deep Learning library, really similar to Python's PyTorch in syntax. It can be used to train and test neural networks on node and on a web browser. The library is well-mantained and well-documented (full docs). It is easy to use and growing in popularity.

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