chore: release 4.5.4 (#775)

🤖 I have created a release \*beep\* \*boop\*
---
### [4.5.4](https://www.github.com/googleapis/nodejs-speech/compare/v4.5.3...v4.5.4) (2021-07-12)


### Bug Fixes

* **deps:** google-gax v2.17.1 ([#774](https://www.github.com/googleapis/nodejs-speech/issues/774)) ([a30fb11](https://www.github.com/googleapis/nodejs-speech/commit/a30fb114f5c0cec095b1b1bd1f1678e2e3dba6fd))
---


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

speech/package.json

@@ -15,7 +15,7 @@
     "test": "c8 mocha system-test --timeout 600000"
   },
   "dependencies": {
-    "@google-cloud/speech": "^4.5.3",
+    "@google-cloud/speech": "^4.5.4",
     "@google-cloud/storage": "^5.0.0",
     "chalk": "^4.0.0",
     "node-record-lpcm16": "^1.0.1",