Update external go packages

go.mod

@@ -3,8 +3,8 @@ module github.com/lunarway/strong-duckling
 go 1.13
 
 require (
-	github.com/prometheus/client_golang v1.11.1
-	github.com/prometheus/common v0.26.0
-	github.com/stretchr/testify v1.8.2
-	gopkg.in/alecthomas/kingpin.v2 v2.2.6
+	github.com/prometheus/client_golang v1.19.0
+	github.com/prometheus/common v0.49.0
+	github.com/stretchr/testify v1.8.4
+	gopkg.in/alecthomas/kingpin.v2 v2.4.0
 )