v3 refactor (#1868)

* Move to v3

Co-authored-by: Ben Toogood <bentoogood@gmail.com>

config/source/etcd/etcd.go

@@ -8,7 +8,7 @@ import (
 
 	cetcd "github.com/coreos/etcd/clientv3"
 	"github.com/coreos/etcd/mvcc/mvccpb"
-	"github.com/micro/go-micro/v2/config/source"
+	"github.com/micro/go-micro/v3/config/source"
 )
 
 // Currently a single etcd reader

config/source/etcd/options.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"time"
 
-	"github.com/micro/go-micro/v2/config/source"
+	"github.com/micro/go-micro/v3/config/source"
 )
 
 type addressKey struct{}

config/source/etcd/util.go

@@ -5,7 +5,7 @@ import (
 
 	"github.com/coreos/etcd/clientv3"
 	"github.com/coreos/etcd/mvcc/mvccpb"
-	"github.com/micro/go-micro/v2/config/encoder"
+	"github.com/micro/go-micro/v3/config/encoder"
 )
 
 func makeEvMap(e encoder.Encoder, data map[string]interface{}, kv []*clientv3.Event, stripPrefix string) map[string]interface{} {

config/source/etcd/watcher.go

@@ -7,7 +7,7 @@ import (
 	"time"
 
 	cetcd "github.com/coreos/etcd/clientv3"
-	"github.com/micro/go-micro/v2/config/source"
+	"github.com/micro/go-micro/v3/config/source"
 )
 
 type watcher struct {