Courtesy of Jinger Duggar/Instagram Jinger Duggar and her husband, Jeremy Vuolo, are officially outnumbered in their household following the arrival of their third baby. “He’s Here! 💙,” Duggar, 31, and Vuolo captioned a Sunday, March 30, YouTube video. “Finally…our baby boy has arrived! In today’s vlog, we share the beautiful moment our girls & family…