Update go dependencies (#1240)

NOTES for update k8s dependencies

In go.mod

require (
    k8s.io/api kubernetes-x.x.x
    k8s.io/apiextensions-apiserver kubernetes-x.x.x
    k8s.io/apimachinery kubernetes-x.x.x
    // check here https://github.com/kubernetes/client-go#compatibility-matrix
    k8s.io/client-go v12.0.0+incompatible
)

cmd/fetcher/app/server.go

@@ -24,7 +24,7 @@ import (
 	"net/http"
 	"os"
 
-	"go.opencensus.io/exporter/jaeger"
+	"contrib.go.opencensus.io/exporter/jaeger"
 	"go.opencensus.io/plugin/ochttp"
 	"go.opencensus.io/trace"
 	"go.uber.org/zap"

cmd/fission-bundle/main.go

@@ -23,8 +23,8 @@ import (
 	"os"
 	"strconv"
 
+	"contrib.go.opencensus.io/exporter/jaeger"
 	docopt "github.com/docopt/docopt-go"
-	"go.opencensus.io/exporter/jaeger"
 	"go.opencensus.io/trace"
 	"go.uber.org/zap"