chore(main): release 4.0.0

[release-please[bot]]

:robot: I have created a release beep boop

4.0.0 (2023-08-03)

⚠ BREAKING CHANGES

• node 12 eos (#1774) (#1784)

Features

• Node 12 eos (#1774) (#1784) (47b83c1)

Bug Fixes

• Fix typings for IAM methods (#1785) (9a6bdbc)

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This PR was generated with Release Please. See documentation.

[feywind]

Still working out some CI issues, don't release yet.

[generated-files-bot[bot]]

Warning: This pull request is touching the following templated files:

• README.md - README.md is managed by synthtool. However, a partials file can be used to update the README, e.g.: https://github.com/googleapis/nodejs-storage/blob/main/.readme-partials.yaml

[release-please[bot]]

:robot: Release is at https://github.com/googleapis/nodejs-pubsub/releases/tag/v4.0.0 :sunflower:

[release-trigger[bot]]

Triggered job: cloud-devrel/client-libraries/nodejs/release/googleapis/nodejs-pubsub/publish (2023-08-03T21:30:51.031Z)

To trigger again, remove the autorelease: triggered label (in a few minutes).

[release-tool-publish-reporter[bot]]

The release build has started, the log can be viewed here. :sunflower:

[release-tool-publish-reporter[bot]]

:egg: You hatched a release! The release build finished successfully! :purple_heart: