Can you share where you found the project files in the client tar.gz?

edit: Found it, uws.js in resources/bootstrap/discord_rpc.zip

edit2: This is arguably worse, but the argument may be "it's a compiled binary":

  -bash-4.1$ strings discord_rpc.node | grep uws.*cpp$
  ../../discord_common/native/third_party/uws/nodejs/addon.cpp
  ../../discord_common/native/third_party/uws/nodejs/addon.cpp
  ../../discord_common/native/third_party/uws/src/EventSystem.cpp
  ../../discord_common/native/third_party/uws/src/Extensions.cpp
  ../../discord_common/native/third_party/uws/src/HTTPSocket.cpp
  ../../discord_common/native/third_party/uws/src/Network.cpp
  ../../discord_common/native/third_party/uws/src/Server.cpp
  ../../discord_common/native/third_party/uws/src/UTF8.cpp
  ../../discord_common/native/third_party/uws/src/WebSocket.cpp
  ../../discord_common/native/third_party/uws/nodejs/addon.cpp
  ../../discord_common/native/third_party/uws/src/HTTPSocket.cpp
  ../../discord_common/native/third_party/uws/src/WebSocket.cpp
  ../../discord_common/native/third_party/uws/src/EventSystem.cpp
  ../../discord_common/native/third_party/uws/src/Extensions.cpp
  ../../discord_common/native/third_party/uws/src/Network.cpp
  ../../discord_common/native/third_party/uws/src/Server.cpp
  ../../discord_common/native/third_party/uws/src/UTF8.cpp
  -bash-4.1$