chore: release 2.3.4 (#545)

🤖 I have created a release \*beep\* \*boop\*
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### [2.3.4](https://www.github.com/googleapis/nodejs-tasks/compare/v2.3.3...v2.3.4) (2021-06-30)


### Bug Fixes

* **deps:** google-gax v2.17.0 with mTLS ([#543](https://www.github.com/googleapis/nodejs-tasks/issues/543)) ([d1a715d](https://www.github.com/googleapis/nodejs-tasks/commit/d1a715d92e0136b1840798c2e122e165201715cd))
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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]

cloud-tasks/package.json

@@ -15,7 +15,7 @@
     "start": "node server.js"
   },
   "dependencies": {
-    "@google-cloud/tasks": "^2.3.3",
+    "@google-cloud/tasks": "^2.3.4",
     "body-parser": "^1.18.3",
     "express": "^4.16.3"
   },