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/trace/apiv2/path_funcs.go

@@ -0,0 +1,43 @@
+// Copyright 2018 Google LLC
+//
+// 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
+//
+//     https://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 trace
+
+// ProjectPath returns the path for the project resource.
+//
+// Deprecated: Use
+//   fmt.Sprintf("projects/%s", project)
+// instead.
+func ProjectPath(project string) string {
+	return "" +
+		"projects/" +
+		project +
+		""
+}
+
+// SpanPath returns the path for the span resource.
+//
+// Deprecated: Use
+//   fmt.Sprintf("projects/%s/traces/%s/spans/%s", project, trace, span)
+// instead.
+func SpanPath(project, trace, span string) string {
+	return "" +
+		"projects/" +
+		project +
+		"/traces/" +
+		trace +
+		"/spans/" +
+		span +
+		""
+}