Please upgrade to 2.15.1 for Prometheus dependency of go Mod

[liguozhong]

github.com/prometheus/prometheus v1.8.2-0.20191126064551-80ba03c67da1 // Prometheus master v2.14.0

Prometheus master v2.15.1

[bwplotka]

@lliguozhong what's your motivation?

Yup, that's the plan. We are waiting on 2.15.2 release though, fixing compaction on Windows: prometheus/prometheus#6547

[bwplotka]

Also help wanted (:

[daixiang0]

@bwplotka happy to take this.

[bwplotka]

I depend on this for #1839 so I will take it if you don't mind (:

[daixiang0]

That is fine :)

[bwplotka]

But again, let's wait on upstream fix that we discussed on Prometheus IRC

[liguozhong]

2.15.2 release ，thanks @bwplotka