Update dependencies

Among others, this updates minio-go, so that the new "eu-west-3" zone
for AWS is supported.

vendor/cloud.google.com/go/bigquery/nulls_test.go

@@ -0,0 +1,53 @@
+// Copyright 2015 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package bigquery
+
+import (
+	"encoding/json"
+	"testing"
+)
+
+func TestNullsJSON(t *testing.T) {
+	for _, test := range []struct {
+		in   interface{}
+		want string
+	}{
+		{NullInt64{Valid: true, Int64: 3}, `3`},
+		{NullFloat64{Valid: true, Float64: 3.14}, `3.14`},
+		{NullBool{Valid: true, Bool: true}, `true`},
+		{NullString{Valid: true, StringVal: "foo"}, `"foo"`},
+		{NullTimestamp{Valid: true, Timestamp: testTimestamp}, `"2016-11-05T07:50:22.000000008Z"`},
+		{NullDate{Valid: true, Date: testDate}, `"2016-11-05"`},
+		{NullTime{Valid: true, Time: testTime}, `"07:50:22.000000"`},
+		{NullDateTime{Valid: true, DateTime: testDateTime}, `"2016-11-05 07:50:22.000000"`},
+
+		{NullInt64{}, `null`},
+		{NullFloat64{}, `null`},
+		{NullBool{}, `null`},
+		{NullString{}, `null`},
+		{NullTimestamp{}, `null`},
+		{NullDate{}, `null`},
+		{NullTime{}, `null`},
+		{NullDateTime{}, `null`},
+	} {
+		bytes, err := json.Marshal(test.in)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if got, want := string(bytes), test.want; got != want {
+			t.Errorf("%#v: got %s, want %s", test.in, got, want)
+		}
+	}
+}