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/firestore/testdata/update-split-top-level.textproto

@@ -0,0 +1,45 @@
+# DO NOT MODIFY. This file was generated by
+# github.com/GoogleCloudPlatform/google-cloud-common/testing/firestore/cmd/generate-firestore-tests/generate-firestore-tests.go.
+
+# The Update method splits only top-level keys at dots. Keys at other levels are
+# taken literally.
+
+description: "update: Split on dots for top-level keys only"
+update: <
+  doc_ref_path: "projects/projectID/databases/(default)/documents/C/d"
+  json_data: "{\"h.g\": {\"j.k\": 6}}"
+  request: <
+    database: "projects/projectID/databases/(default)"
+    writes: <
+      update: <
+        name: "projects/projectID/databases/(default)/documents/C/d"
+        fields: <
+          key: "h"
+          value: <
+            map_value: <
+              fields: <
+                key: "g"
+                value: <
+                  map_value: <
+                    fields: <
+                      key: "j.k"
+                      value: <
+                        integer_value: 6
+                      >
+                    >
+                  >
+                >
+              >
+            >
+          >
+        >
+      >
+      update_mask: <
+        field_paths: "h.g"
+      >
+      current_document: <
+        exists: true
+      >
+    >
+  >
+>