vendor: update all dependencies to latest versions

vendor/cloud.google.com/go/firestore/testdata/delete-exists-precond.textproto

@@ -0,0 +1,21 @@
+# DO NOT MODIFY. This file was generated by
+# github.com/GoogleCloudPlatform/google-cloud-common/testing/firestore/cmd/generate-firestore-tests/generate-firestore-tests.go.
+
+# Delete supports an exists precondition.
+
+description: "delete: delete with exists precondition"
+delete: <
+  doc_ref_path: "projects/projectID/databases/(default)/documents/C/d"
+  precondition: <
+    exists: true
+  >
+  request: <
+    database: "projects/projectID/databases/(default)"
+    writes: <
+      delete: "projects/projectID/databases/(default)/documents/C/d"
+      current_document: <
+        exists: true
+      >
+    >
+  >
+>