chore: release 5.15.4 (#1693)

🤖 I have created a release \*beep\* \*boop\*
---
### [5.15.4](https://www.github.com/googleapis/nodejs-storage/compare/v5.15.3...v5.15.4) (2021-11-01)


### Bug Fixes

* check e is not null ([#1692](https://www.github.com/googleapis/nodejs-storage/issues/1692)) ([56ff485](https://www.github.com/googleapis/nodejs-storage/commit/56ff485cbe28ba048c9a689711b034c416853b1f))
---


This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).

Author: release-please[bot]

handwritten/storage/CHANGELOG.md

@@ -4,6 +4,13 @@
 
 [1]: https://www.npmjs.com/package/nodejs-storage?activeTab=versions
 
+### [5.15.4](https://www.github.com/googleapis/nodejs-storage/compare/v5.15.3...v5.15.4) (2021-11-01)
+
+
+### Bug Fixes
+
+* check e is not null ([#1692](https://www.github.com/googleapis/nodejs-storage/issues/1692)) ([56ff485](https://www.github.com/googleapis/nodejs-storage/commit/56ff485cbe28ba048c9a689711b034c416853b1f))
+
 ### [5.15.3](https://www.github.com/googleapis/nodejs-storage/compare/v5.15.2...v5.15.3) (2021-10-14)
 
 

handwritten/storage/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@google-cloud/storage",
   "description": "Cloud Storage Client Library for Node.js",
-  "version": "5.15.3",
+  "version": "5.15.4",
   "license": "Apache-2.0",
   "author": "Google Inc.",
   "engines": {