fix golint issues

zrpc/internal/resolver/directbuilder_test.go

@@ -23,6 +23,7 @@ func TestDirectBuilder_Build(t *testing.T) {
 	}
 
 	for _, test := range tests {
+		test := test
 		t.Run(strconv.Itoa(test), func(t *testing.T) {
 			var servers []string
 			for i := 0; i < test; i++ {

zrpc/internal/resolver/subset_test.go

@@ -27,6 +27,7 @@ func TestSubset(t *testing.T) {
 	}
 
 	for _, test := range tests {
+		test := test
 		t.Run(test.name, func(t *testing.T) {
 			var vals []string
 			for i := 0; i < test.set; i++ {