docs(Ng1StateHooks): Corrected interface and docs (#3076)
docs(Ng1StateHooks): Corrected interface and docs (#3076)

for state transition hooks onEnter, onExit & onRetain
angular-ui/ui-router,angular-ui/ui-router,mattlewis92/ui-router,codersongs/codersongs.github.io,angular-ui/ui-router,codersongs/codersongs.github.io,fpipita/ui-router,mattlewis92/ui-router,fpipita/ui-router,fpipita/ui-router