Fix. MSVC project use `ZMQ4_DIR` env variable.
Fix. MSVC project use `ZMQ4_DIR` env variable.

moteus/lzmq,bsn069/lzmq,zeromq/lzmq,zeromq/lzmq,LuaDist/lzmq-ffi,LuaDist/lzmq,LuaDist/lzmq,zeromq/lzmq,moteus/lzmq,moteus/lzmq,LuaDist/lzmq-ffi,bsn069/lzmq