*: bump version to 0.19.0
*: bump version to 0.19.0

alileza/prometheus,yanghongkjxy/prometheus,Stackdriver/stackdriver-prometheus,ton31337/prometheus,agaoglu/prometheus,tattsun/prometheus,JavierZunzunegui/prometheus,tomwilkie/prometheus,Stackdriver/stackdriver-prometheus,alileza/prometheus,prometheus/prometheus,slok/prometheus,dsymonds/prometheus,GoogleCloudPlatform/prometheus,tattsun/prometheus,Stackdriver/stackdriver-prometheus,kangwoo/prometheus,Conorbro/prometheus,ton31337/prometheus,kzittritsch/prometheus,keegancsmith/prometheus,yanghongkjxy/prometheus,tomwilkie/prometheus,brancz/prometheus,datajet-io/prometheus,brancz/prometheus,agaoglu/prometheus,dmilstein/prometheus,msiebuhr/prometheus,PrFalken/prometheus,adamron1/prometheus,AlekSi/prometheus,Colstuwjx/prometheus,kzittritsch/prometheus,datajet-io/prometheus,dmilstein/prometheus,JavierZunzunegui/prometheus,agaoglu/prometheus,JavierZunzunegui/prometheus,gottwald/prometheus,msiebuhr/prometheus,GoogleCloudPlatform/prometheus,keegancsmith/prometheus,AlekSi/prometheus,gottwald/prometheus,brancz/prometheus,tomwilkie/prometheus,gottwald/prometheus,sudhi-vm/prometheus,PrFalken/prometheus,Colstuwjx/prometheus,slok/prometheus,Gouthamve/prometheus,Stackdriver/stackdriver-prometheus,yanghongkjxy/prometheus,GoogleCloudPlatform/prometheus,gottwald/prometheus,kzittritsch/prometheus,keegancsmith/prometheus,brancz/prometheus,sudhi-vm/prometheus,dmilstein/prometheus,SaltedMan/prometheus-annotated,datajet-io/prometheus,msiebuhr/prometheus,Colstuwjx/prometheus,kangwoo/prometheus,JavierZunzunegui/prometheus,alileza/prometheus,keegancsmith/prometheus,agaoglu/prometheus,datajet-io/prometheus,GoogleCloudPlatform/prometheus,slok/prometheus,amorken/prometheus,tattsun/prometheus,adamron1/prometheus,Conorbro/prometheus,dsymonds/prometheus,Conorbro/prometheus,sudhi-vm/prometheus,sudhi-vm/prometheus,alileza/prometheus,ton31337/prometheus,tomwilkie/prometheus,PrFalken/prometheus,amorken/prometheus,kangwoo/prometheus,Conorbro/prometheus,SaltedMan/prometheus-annotated,dmilstein/prometheus,prometheus/prometheus,SaltedMan/prometheus-annotated,ton31337/prometheus,msiebuhr/prometheus,prometheus/prometheus,kangwoo/prometheus,AlekSi/prometheus,adamron1/prometheus,dsymonds/prometheus,Gouthamve/prometheus,GoogleCloudPlatform/prometheus,prometheus/prometheus,amorken/prometheus,Colstuwjx/prometheus,alileza/prometheus,tattsun/prometheus,SaltedMan/prometheus-annotated,slok/prometheus,PrFalken/prometheus,AlekSi/prometheus,yanghongkjxy/prometheus,dsymonds/prometheus,prometheus/prometheus,amorken/prometheus,Gouthamve/prometheus,adamron1/prometheus,keegancsmith/prometheus,kzittritsch/prometheus,Gouthamve/prometheus