Update Go version to 1.20.8

Signed-off-by: Michael Spencer <[email protected]>

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.19.8-alpine
+FROM golang:1.20.8-alpine
 RUN mkdir /mq2prom
 COPY . /mq2prom
 WORKDIR /mq2prom

go.mod

@@ -1,28 +1,30 @@
 module github.com/IBM/mq2prom
 
-go 1.19
+go 1.20
 
 require (
-	github.com/eclipse/paho.mqtt.golang v1.3.5
-	github.com/prometheus/client_golang v1.14.0
-	github.com/sirupsen/logrus v1.8.1
-	github.com/stretchr/testify v1.4.0
-	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
+	github.com/eclipse/paho.mqtt.golang v1.4.3
+	github.com/prometheus/client_golang v1.16.0
+	github.com/sirupsen/logrus v1.9.3
+	github.com/stretchr/testify v1.8.4
+	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.1.2 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/golang/protobuf v1.5.2 // indirect
-	github.com/gorilla/websocket v1.4.2 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/gorilla/websocket v1.5.0 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/prometheus/client_model v0.3.0 // indirect
-	github.com/prometheus/common v0.37.0 // indirect
-	github.com/prometheus/procfs v0.8.0 // indirect
-	golang.org/x/net v0.7.0 // indirect
-	golang.org/x/sys v0.5.0 // indirect
-	google.golang.org/protobuf v1.28.1 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
+	github.com/prometheus/common v0.42.0 // indirect
+	github.com/prometheus/procfs v0.10.1 // indirect
+	github.com/rogpeppe/go-internal v1.11.0 // indirect
+	golang.org/x/net v0.8.0 // indirect
+	golang.org/x/sync v0.2.0 // indirect
+	golang.org/x/sys v0.8.0 // indirect
+	google.golang.org/protobuf v1.30.0 // indirect
 )