Morgan Wallen is a dad...Luke Bryan is still at #1... Morgan Wallen is a dad! His former fiancée, Katie Smith, gave birth to their son Indigo Wilder on Friday.Morgan wrote on Instagram,"I knew this day was coming when I got to share this news with y’all. And I’m glad that day is here. I didn’t know what being a dad would feel like, honestly have been a little scared. But it’s the coolest feeling, and I’m ready for whatever God…