Implement sync testflight config command#203

Draft

DechengMa wants to merge 30 commits intomasterfrom

testflight/sync

Commits on Jul 15, 2020

Commits on Jul 21, 2020

Add refresh local after sync completed feature
DechengMa
committed

Commits on Jul 23, 2020

Commits on Jul 27, 2020

Make convenience init for BetaGroup and Testers for init sdk model
DechengMa
committed
Optimised pullTestFlightConfigurations for running request in parallel
DechengMa
committed

Commits on Jul 28, 2020