Antero Midstream GP LP Increases Long-Term Distribution Target For 2018 From $0.43-$0.46 To $0.52-$0.55, 2019 Target Raised From $0.70-$0.76 To $0.84-$0.91, 2020 Target Raised From $1.06-$1.16 To $1.28-$1.40