fix(windows): Fix async handle leak (#1367)
fix(windows): Fix async handle leak (#1367)

Fixes event loop weirdness in #1363
EmergingTechnologyAdvisors/node-serialport,EmergingTechnologyAdvisors/node-serialport,voodootikigod/node-serialport,node-serialport/node-serialport,node-serialport/node-serialport,EmergingTechnologyAdvisors/node-serialport,node-serialport/node-serialport,EmergingTechnologyAdvisors/node-serialport,voodootikigod/node-serialport,node-serialport/node-serialport,node-serialport/node-serialport,EmergingTechnologyAdvisors/node-serialport,voodootikigod/node-serialport,voodootikigod/node-serialport