[BUG] Dependencies incompatible with latest Phoenix.

[mveytsman]

I get the following issue when upgrading Phoenix to 1.7.0-rc.0 on a project with prom_ex:

Failed to use "plug_cowboy" (version 2.6.0) because
  phoenix (version 1.7.0-rc.0) requires ~> 2.6
  prom_ex (version 1.7.1) requires ~> 2.5.1
  mix.lock specifies 2.6.0

Could we have a release with an updated plug_cowboy dependency?

I see there's a PR #162 which loosens version requirements which will solve this.

[mikl]

Just a FYI for anyone struggling with this, you can override this resolution problem by adding this to your mix.exs:

{:plug_cowboy, "~> 2.6", override: true},

[tmartin8080]

Closing, addressed in #192