The spout folder is a copy of the folder:
SpoutSDK/Source in the repository:
https://github.com/leadedge/Spout2.git/SpoutSDK/Source/SPOUT_LIBRARY/Binaries
and
https://github.com/leadedge/Spout2.git/SpoutSDK/Source/SPOUT_LIBRARY/Include

Last update:
https://github.com/leadedge/Spout2/commit/28dbea6059cd7968c4d2b296d6739a5fdebe9104