[iOS] onPageSelected doesn't get fired when scrolled too fast

[ericapply]

Using IndicatorViewPager
If you scroll through before the page completely stops,
onPageSelected callback never gets fired.
On Android, this works as intended, where even if you scroll through fast no indexes are missed.

For instance, if you log the indexes in iOS it may show up as
1, 2, 5 where index 3 and 4 were scrolled before fully stopped.

versions:

"react": "15.4.2",
"react-native": "0.41.2",
"rn-viewpager": "^1.1.4",

[PeterLocas]

same problem @ericapply

[vadermemo]

Same here @ericapply

"react": "16.8.3",
"react-native": "0.59.1",
"rn-viewpager": "^1.2.9",