chore(main): release 4.0.0 (#529)

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md
Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: release-please[bot]

packages/google-cloud-oslogin/CHANGELOG.md

@@ -4,6 +4,17 @@
 
 [1]: https://www.npmjs.com/package/@google-cloud/os-login?activeTab=versions
 
+## [4.0.0](https://github.com/googleapis/nodejs-os-login/compare/v3.3.1...v4.0.0) (2022-05-20)
+
+
+### ⚠ BREAKING CHANGES
+
+* update library to use Node 12 (#527)
+
+### Build System
+
+* update library to use Node 12 ([#527](https://github.com/googleapis/nodejs-os-login/issues/527)) ([32db700](https://github.com/googleapis/nodejs-os-login/commit/32db70055f46499e97607123ec84fd72ff2c749f))
+
 ### [3.3.1](https://www.github.com/googleapis/nodejs-os-login/compare/v3.3.0...v3.3.1) (2021-09-09)
 
 

packages/google-cloud-oslogin/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@google-cloud/os-login",
   "description": "Google Cloud OS Login API client for Node.js",
-  "version": "3.3.1",
+  "version": "4.0.0",
   "license": "Apache-2.0",
   "author": "Google Inc",
   "engines": {

packages/google-cloud-oslogin/samples/generated/v1/snippet_metadata.google.cloud.oslogin.v1.json

@@ -1,7 +1,7 @@
 {
     "clientLibrary": {
         "name": "nodejs-oslogin",
-        "version": "3.3.1",
+        "version": "4.0.0",
         "language": "TYPESCRIPT",
         "apis": [
             {

packages/google-cloud-oslogin/samples/generated/v1beta/snippet_metadata.google.cloud.oslogin.v1beta.json

@@ -1,7 +1,7 @@
 {
     "clientLibrary": {
         "name": "nodejs-oslogin",
-        "version": "3.3.1",
+        "version": "4.0.0",
         "language": "TYPESCRIPT",
         "apis": [
             {

packages/google-cloud-oslogin/samples/package.json

@@ -14,7 +14,7 @@
     "test": "mocha"
   },
   "dependencies": {
-    "@google-cloud/os-login": "^3.3.1"
+    "@google-cloud/os-login": "^4.0.0"
   },
   "devDependencies": {
     "chai": "^4.2.0",