Carthage build fails with incompatible deployment target

[kkalisz]

Hi,
I have trouble with using Charts Realm alongside with carthage. I'm getting exception during build:
Checkouts/ChartsRealm/ChartsRealm/Classes/Data/RealmBarDataSet.swift:14:8: error: compiling for iOS 8.0, but module 'Charts' has a minimum deployment target of iOS 8.4:

I think it's expected behaviour with current configuration, as I checked project settings
Charts 3.4.0 = iPhone Deployment target is 8.4
Charts Realm 3.4.0 = iPhone Deployment target is 8.0

So indeed it should not compile because child dependency has bigger target value than library itself,
and Carthage is honoring deployment target from project settings

I think that changing deployment target for ChartsReam to 8.4 should fix issue.
I can prepare PR, just let me know what you think about that.

Best Regards

[liuxuan30]

is it from master? I didn't realize such issue there. If this is the truth, I would appreciate if you can create an PR.