chore: release 1.7.3 (#159)

🤖 I have created a release \*beep\* \*boop\*
---
### [1.7.3](https://www.github.com/googleapis/nodejs-ai-platform/compare/v1.7.2...v1.7.3) (2021-06-29)


### Bug Fixes

* add C#, PHP and Ruby options for all AI Platform protos ([#158](https://www.github.com/googleapis/nodejs-ai-platform/issues/158)) ([da0babf](https://www.github.com/googleapis/nodejs-ai-platform/commit/da0babf54c6b074b8dc3d0354f8a57b9bc0cefc1))
* **deps:** google-gax v2.17.0 with mTLS ([#161](https://www.github.com/googleapis/nodejs-ai-platform/issues/161)) ([8e7d46f](https://www.github.com/googleapis/nodejs-ai-platform/commit/8e7d46f1252c4e89a663dd28b70b49bf269f091a))
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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]

ai-platform/snippets/package.json

@@ -13,7 +13,7 @@
     "test": "mocha --timeout 1200000 test/*.js"
   },
   "dependencies": {
-    "@google-cloud/aiplatform": "^1.7.2",
+    "@google-cloud/aiplatform": "^1.7.3",
     "@google-cloud/storage": "^5.5.0"
   },
   "devDependencies": {