chore: upgrade dependencies (#221)

* chore: upgraded github.com/prometheus/client_golang v1.10.0 => v1.12.1

* chore: updating dependencies

go.mod

@@ -2,23 +2,15 @@ module github.com/hipages/php-fpm_exporter
 
 require (
 	github.com/davecgh/go-spew v1.1.1
-	github.com/fatih/color v1.9.0 // indirect
 	github.com/gosuri/uitable v0.0.4
-	github.com/mattn/go-colorable v0.1.6 // indirect
 	github.com/mattn/go-runewidth v0.0.8 // indirect
 	github.com/mitchellh/go-homedir v1.1.0
-	github.com/pelletier/go-toml v1.6.0 // indirect
-	github.com/prometheus/client_golang v1.10.0
+	github.com/prometheus/client_golang v1.12.1
 	github.com/sirupsen/logrus v1.8.1
-	github.com/spf13/afero v1.2.2 // indirect
-	github.com/spf13/cast v1.3.1 // indirect
-	github.com/spf13/cobra v0.0.7
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/spf13/viper v1.7.1
-	github.com/stretchr/testify v1.7.0
+	github.com/spf13/cobra v1.4.0
+	github.com/spf13/viper v1.10.1
+	github.com/stretchr/testify v1.7.1
 	github.com/tomasen/fcgi_client v0.0.0-20180423082037-2bb3d819fd19
-	gopkg.in/ini.v1 v1.52.0 // indirect
 )
 
 go 1.13