chore: release 3.2.1 (#161)

🤖 I have created a release \*beep\* \*boop\*
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### [3.2.1](https://www.github.com/googleapis/nodejs-service-directory/compare/v3.2.0...v3.2.1) (2021-06-30)


### Bug Fixes

* **deps:** google-gax v2.17.0 with mTLS ([#159](https://www.github.com/googleapis/nodejs-service-directory/issues/159)) ([02861a1](https://www.github.com/googleapis/nodejs-service-directory/commit/02861a17ec3f9bfedb83ded18190e6ee1d7b901f))
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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]

service-directory/snippets/package.json

@@ -13,7 +13,7 @@
     "test": "c8 mocha --timeout 600000 test/*.js"
   },
   "dependencies": {
-    "@google-cloud/service-directory": "^3.2.0",
+    "@google-cloud/service-directory": "^3.2.1",
     "eslint": "^7.0.0",
     "json-schema": "^0.3.0",
     "uuid": "^8.0.0"