[RNMobile] Release v1.21.0 to master#19854

Merged

maxme merged 3 commits intomasterfrom rnmobile/release-v1.21.0

Jan 24, 2020

+1

Commits on Jan 22, 2020

Adding empty function to RichText children call. (#19818 )
etoledom
authored

Commits on Jan 23, 2020

Disable gallery image size options on mobile (#19828 )
mkevins
authored

Commits on Jan 24, 2020

Revert "Disable gallery image size options on mobile (#19828 )"
mkevins
committed