Bump github.com/prometheus/client_golang from 1.10.0 to 1.11.0

Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 1.10.0 to 1.11.0.
- [Release notes](https://github.com/prometheus/client_golang/releases)
- [Changelog](https://github.com/prometheus/client_golang/blob/master/CHANGELOG.md)
- [Commits](prometheus/client_golang@v1.10.0...v1.11.0)

---
updated-dependencies:
- dependency-name: github.com/prometheus/client_golang
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -5,13 +5,14 @@ go 1.13
 require (
 	bou.ke/monkey v1.0.2
 	github.com/pkg/errors v0.9.1
-	github.com/prometheus/client_golang v1.10.0
+	github.com/prometheus/client_golang v1.11.0
 	github.com/spf13/viper v1.7.1
 	github.com/stretchr/testify v1.7.0
 	go.uber.org/atomic v1.9.0
 	go.uber.org/dig v1.10.0
 	go.uber.org/zap v1.18.1
 	golang.org/x/net v0.0.0-20200625001655-4c5254603344
+	golang.org/x/tools v0.0.0-20200103221440-774c71fcf114 // indirect
 	google.golang.org/grpc v1.37.0
 )