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/create-empty.textproto

@@ -0,0 +1,20 @@
+# DO NOT MODIFY. This file was generated by
+# github.com/GoogleCloudPlatform/google-cloud-common/testing/firestore/cmd/generate-firestore-tests/generate-firestore-tests.go.
+
+
+description: "create: creating or setting an empty map"
+create: <
+  doc_ref_path: "projects/projectID/databases/(default)/documents/C/d"
+  json_data: "{}"
+  request: <
+    database: "projects/projectID/databases/(default)"
+    writes: <
+      update: <
+        name: "projects/projectID/databases/(default)/documents/C/d"
+      >
+      current_document: <
+        exists: false
+      >
+    >
+  >
+>