chore: release 1.19.2

[github-actions]

🤖 I have created a release *beep* *boop*

1.19.2 (2021-02-16)

Bug Fixes

• improve logging for file descriptor limits (#609) (b42b681), closes #413

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[github-actions]

🤖 Release is at https://github.com/GoogleCloudPlatform/cloudsql-proxy/releases/tag/v1.19.2 🌻