chore(main): release 4.0.0 (#1791)

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


## [4.0.0](https://togithub.com/googleapis/nodejs-pubsub/compare/v3.7.3...v4.0.0) (2023-08-03)


### ⚠ BREAKING CHANGES

* node 12 eos ([#1774](https://togithub.com/googleapis/nodejs-pubsub/issues/1774)) (#1784)

### Features

* Node 12 eos ([#1774](https://togithub.com/googleapis/nodejs-pubsub/issues/1774)) ([#1784](https://togithub.com/googleapis/nodejs-pubsub/issues/1784)) ([47b83c1](https://togithub.com/googleapis/nodejs-pubsub/commit/47b83c18c543a7c8763256f79927a7340db56568))


### Bug Fixes

* Fix typings for IAM methods ([#1785](https://togithub.com/googleapis/nodejs-pubsub/issues/1785)) ([9a6bdbc](https://togithub.com/googleapis/nodejs-pubsub/commit/9a6bdbce952c81cb1a43fecbce16a3e3ab0f1420))

---
This PR was generated with [Release Please](https://togithub.com/googleapis/release-please). See [documentation](https://togithub.com/googleapis/release-please#release-please).

CHANGELOG.md

@@ -4,6 +4,22 @@
 
 [1]: https://www.npmjs.com/package/@google-cloud/pubsub?activeTab=versions
 
+## [4.0.0](https://github.com/googleapis/nodejs-pubsub/compare/v3.7.3...v4.0.0) (2023-08-03)
+
+
+### ⚠ BREAKING CHANGES
+
+* node 12 eos ([#1774](https://github.com/googleapis/nodejs-pubsub/issues/1774)) (#1784)
+
+### Features
+
+* Node 12 eos ([#1774](https://github.com/googleapis/nodejs-pubsub/issues/1774)) ([#1784](https://github.com/googleapis/nodejs-pubsub/issues/1784)) ([47b83c1](https://github.com/googleapis/nodejs-pubsub/commit/47b83c18c543a7c8763256f79927a7340db56568))
+
+
+### Bug Fixes
+
+* Fix typings for IAM methods ([#1785](https://github.com/googleapis/nodejs-pubsub/issues/1785)) ([9a6bdbc](https://github.com/googleapis/nodejs-pubsub/commit/9a6bdbce952c81cb1a43fecbce16a3e3ab0f1420))
+
 ## [3.7.3](https://github.com/googleapis/nodejs-pubsub/compare/v3.7.2...v3.7.3) (2023-07-26)
 
 

README.md

@@ -184,7 +184,7 @@ also contains samples.
 
 ## Supported Node.js Versions
 
-Our client libraries follow the [Node.js release schedule](https://github.com/nodejs/release#release-schedule).
+Our client libraries follow the [Node.js release schedule](https://nodejs.org/en/about/releases/).
 Libraries are compatible with all current _active_ and _maintenance_ versions of
 Node.js.
 If you are using an end-of-life version of Node.js, we recommend that you update