etcdctl: Make etcdctl a module (go.mod, LICENSE)

go.mod

@@ -8,12 +8,10 @@ require (
 	github.com/coreos/go-systemd/v22 v22.1.0
 	github.com/dgrijalva/jwt-go v3.2.0+incompatible
 	github.com/dustin/go-humanize v1.0.0
-	github.com/fatih/color v1.7.0 // indirect
 	github.com/gogo/protobuf v1.3.1
 	github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e
 	github.com/golang/protobuf v1.3.5
 	github.com/google/btree v1.0.0
-	github.com/gorilla/websocket v1.4.2 // indirect
 	github.com/grpc-ecosystem/go-grpc-middleware v1.2.2
 	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0
 	github.com/grpc-ecosystem/grpc-gateway v1.14.6
@@ -22,17 +20,14 @@ require (
 	github.com/kr/text v0.2.0 // indirect
 	github.com/mattn/go-colorable v0.1.8 // indirect
 	github.com/mattn/go-runewidth v0.0.9 // indirect
-	github.com/olekukonko/tablewriter v0.0.4
 	github.com/prometheus/client_golang v1.5.1
 	github.com/prometheus/client_model v0.2.0
 	github.com/prometheus/common v0.10.0 // indirect
 	github.com/prometheus/procfs v0.2.0 // indirect
 	github.com/sirupsen/logrus v1.7.0 // indirect
 	github.com/soheilhy/cmux v0.1.4
-	github.com/spf13/cobra v1.0.0
-	github.com/spf13/pflag v1.0.5
+	github.com/spf13/cobra v1.1.1
 	github.com/tmc/grpc-websocket-proxy v0.0.0-20200427203606-3cfed13b9966
-	github.com/urfave/cli v1.22.1
 	github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2
 	go.etcd.io/bbolt v1.3.5
 	go.etcd.io/etcd/api/v3 v3.0.0-00010101000000-000000000000
@@ -48,7 +43,7 @@ require (
 	golang.org/x/tools v0.0.0-20201014170642-d1624618ad65 // indirect
 	google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884
 	google.golang.org/grpc v1.29.1
-	gopkg.in/cheggaaa/pb.v1 v1.0.25
+	gopkg.in/cheggaaa/pb.v1 v1.0.28
 	sigs.k8s.io/yaml v1.2.0
 )