Define StreamEventFlag constants if not present
Define StreamEventFlag constants if not present

Resolves pipobscure/fsevents#34
Resolves pipobscure/fsevents#33
Resolves pipobscure/fsevents#20

gdi2290/fsevents,bnoordhuis/fsevents,strongloop/fsevents,eccenca/fsevents,strongloop/fsevents,bnoordhuis/fsevents,strongloop/fsevents,eccenca/fsevents,bnoordhuis/fsevents,pmq20/fsevents,xzyfer/fsevents,pmq20/fsevents,xzyfer/fsevents,mauritslamers/fsevents-bin,strongloop/fsevents,eccenca/fsevents,xzyfer/fsevents,pmq20/fsevents,mauritslamers/fsevents-bin,gdi2290/fsevents,aredridel/fsevents,gdi2290/fsevents,aredridel/fsevents,aredridel/fsevents