move utils.Stream interface to separate file

utils/stream.go

@@ -0,0 +1,16 @@
+package utils
+
+import (
+	"io"
+
+	"github.com/lucas-clemente/quic-go/protocol"
+)
+
+// Stream is the interface for QUIC streams
+type Stream interface {
+	io.Reader
+	io.Writer
+	io.Closer
+	StreamID() protocol.StreamID
+	CloseRemote(offset protocol.ByteCount)
+}

utils/utils.go

@@ -3,19 +3,8 @@ package utils
 import (
 	"bytes"
 	"io"
-
-	"github.com/lucas-clemente/quic-go/protocol"
 )
 
-// Stream is the interface for QUIC streams
-type Stream interface {
-	io.Reader
-	io.Writer
-	io.Closer
-	StreamID() protocol.StreamID
-	CloseRemote(offset protocol.ByteCount)
-}
-
 // ReadUintN reads N bytes
 func ReadUintN(b io.ByteReader, length uint8) (uint64, error) {
 	var res uint64