Major update to typescript-eslint plugins (v4.15.2) and eslint-config-prettier (v8.1.0); minor updates to other eslint components.
Doesn't seem to generate any warnings after updating so I think we're good?
Updates node-watch dep to ^0.7.1 which is a breaking change in the interface of watch function for compatibility on certain windows systems that don't give event and filename info.
Also updates ws dep to v^7.4.3, minor version and bug fixes.
