pkg: Rename imports after making 'pkg' a module

find -name '*.go' | xargs sed --follow-symlinks -i 's|go.etcd.io/etcd/v3/pkg/|go.etcd.io/etcd/pkg/v3/|g'
go fmt ./...

client/client_test.go

@@ -30,7 +30,7 @@ import (
 	"time"
 
 	"go.etcd.io/etcd/api/v3/version"
-	"go.etcd.io/etcd/v3/pkg/testutil"
+	"go.etcd.io/etcd/pkg/v3/testutil"
 )
 
 type actionAssertingHTTPClient struct {

client/discover.go

@@ -15,7 +15,7 @@
 package client
 
 import (
-	"go.etcd.io/etcd/v3/pkg/srv"
+	"go.etcd.io/etcd/pkg/v3/srv"
 )
 
 // Discoverer is an interface that wraps the Discover method.

client/keys.go

@@ -19,7 +19,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"go.etcd.io/etcd/v3/pkg/pathutil"
+	"go.etcd.io/etcd/pkg/v3/pathutil"
 	"net/http"
 	"net/url"
 	"strconv"

client/main_test.go

@@ -18,7 +18,7 @@ import (
 	"net/http"
 	"testing"
 
-	"go.etcd.io/etcd/v3/pkg/testutil"
+	"go.etcd.io/etcd/pkg/v3/testutil"
 )
 
 func exampleEndpoints() []string        { return nil }

client/members.go

@@ -23,7 +23,7 @@ import (
 	"net/url"
 	"path"
 
-	"go.etcd.io/etcd/v3/pkg/types"
+	"go.etcd.io/etcd/pkg/v3/types"
 )
 
 var (

client/members_test.go

@@ -23,7 +23,7 @@ import (
 	"reflect"
 	"testing"
 
-	"go.etcd.io/etcd/v3/pkg/types"
+	"go.etcd.io/etcd/pkg/v3/types"
 )
 
 func TestMembersAPIActionList(t *testing.T) {