Bump github.com/prometheus/client_golang from 0.9.3 to 1.20.3

Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 0.9.3 to 1.20.3.
- [Release notes](https://github.com/prometheus/client_golang/releases)
- [Changelog](https://github.com/prometheus/client_golang/blob/v1.20.3/CHANGELOG.md)
- [Commits](prometheus/client_golang@v0.9.3...v1.20.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -5,30 +5,22 @@ go 1.16
 require (
 	github.com/fsnotify/fsnotify v1.4.9 // indirect
 	github.com/gogo/protobuf v1.3.2
-	github.com/golang/snappy v0.0.2 // indirect
 	github.com/google/pprof v0.0.0-20211108044417-e9b028704de0
 	github.com/gopherjs/gopherjs v0.0.0-20200217142428-fce0ec30dd00 // indirect
 	github.com/ianlancetaylor/demangle v0.0.0-20210905161508-09a460cdf81d
-	github.com/klauspost/compress v1.11.3 // indirect
-	github.com/kr/pretty v0.2.1 // indirect
-	github.com/kr/text v0.2.0 // indirect
 	github.com/magiconair/properties v1.8.4 // indirect
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/mitchellh/mapstructure v1.3.3 // indirect
-	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
 	github.com/onosproject/onos-api/go v0.7.110
 	github.com/onosproject/onos-lib-go v0.7.13
 	github.com/pelletier/go-toml v1.8.1 // indirect
 	github.com/pierrec/lz4 v2.6.0+incompatible // indirect
-	github.com/prometheus/client_golang v0.9.3
+	github.com/prometheus/client_golang v1.20.3
 	github.com/smartystreets/assertions v1.2.0 // indirect
-	github.com/spf13/afero v1.4.1 // indirect
 	github.com/spf13/cast v1.3.1 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
 	github.com/spf13/viper v1.7.1
-	github.com/stretchr/testify v1.7.0
-	google.golang.org/grpc v1.33.2
-	gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b // indirect
+	github.com/stretchr/testify v1.9.0
+	google.golang.org/grpc v1.55.0
 	gopkg.in/ini.v1 v1.62.0 // indirect
-	gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776 // indirect
 )