Revert "Update deps"

This reverts commit 49e5c87f8d.

vendor/github.com/miekg/dns/msg_test.go

@@ -26,28 +26,6 @@ var (
 	})
 )
 
-func TestPackNoSideEffect(t *testing.T) {
-	m := new(Msg)
-	m.SetQuestion(Fqdn("example.com."), TypeNS)
-
-	a := new(Msg)
-	o := &OPT{
-		Hdr: RR_Header{
-			Name:   ".",
-			Rrtype: TypeOPT,
-		},
-	}
-	o.SetUDPSize(DefaultMsgSize)
-
-	a.Extra = append(a.Extra, o)
-	a.SetRcode(m, RcodeBadVers)
-
-	a.Pack()
-	if a.Rcode != RcodeBadVers {
-		t.Errorf("after pack: Rcode is expected to be BADVERS")
-	}
-}
-
 func TestUnpackDomainName(t *testing.T) {
 	var cases = []struct {
 		label          string