Check for global.self first (#148)
Check for global.self first (#148)

This will throw an error in WebWorker where `self` is already defined
yesdr/haul,callstack-io/haul,callstack-io/haul,callstack-io/haul,yesdr/haul,callstack-io/haul,callstack-io/haul,yesdr/haul,yesdr/haul,yesdr/haul