Support Xcode 11 and new Swift 5

Bug Fix

#4029: Index out of bounds exception in v3.2 in createAccessibleElement #4094: Horizontal Bezier Line Graph Not Drawing Through All Points #4093: Line chart x axis animation is broken #4099: Line renderer did not render lines if their coordinates fell outside of the viewport full change log:https://github.com/danielgindi/Charts/blob/master/CHANGELOG.md

pod updated