prometheus 2.3.0

Only display out-of-date packages.

5 Reverse deps	Accepted versions
ekg-prometheus-adapter	>=0.4.0 && <3.0.0
eventuo11y-prometheus	^>=2.2.3
prometheus-wai-middleware	>=2.2 && <2.3
ridley	>0.5.0 && <2.3.0
ridley-extras	<3