chore: release 4.15.0 (#1594)

🤖 I have created a release \*beep\* \*boop\*
---
## [4.15.0](https://www.github.com/googleapis/nodejs-firestore/compare/v4.14.2...v4.15.0) (2021-08-26)


### Features

* turns on self-signed JWT feature flag ([#1593](https://www.github.com/googleapis/nodejs-firestore/issues/1593)) ([feee8cc](https://www.github.com/googleapis/nodejs-firestore/commit/feee8cc1b32ab04613f654806ca31477328059ff))


### Bug Fixes

* Handles identical document ids from different collections. ([#1599](https://www.github.com/googleapis/nodejs-firestore/issues/1599)) ([745b608](https://www.github.com/googleapis/nodejs-firestore/commit/745b608a7883a27ccb1c4d1f7800fdcc9a7917b1))
---


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

CHANGELOG.md

@@ -4,6 +4,18 @@
 
 [1]: https://www.npmjs.com/package/@google-cloud/firestore?activeTab=versions
 
+## [4.15.0](https://www.github.com/googleapis/nodejs-firestore/compare/v4.14.2...v4.15.0) (2021-08-26)
+
+
+### Features
+
+* turns on self-signed JWT feature flag ([#1593](https://www.github.com/googleapis/nodejs-firestore/issues/1593)) ([feee8cc](https://www.github.com/googleapis/nodejs-firestore/commit/feee8cc1b32ab04613f654806ca31477328059ff))
+
+
+### Bug Fixes
+
+* Handles identical document ids from different collections. ([#1599](https://www.github.com/googleapis/nodejs-firestore/issues/1599)) ([745b608](https://www.github.com/googleapis/nodejs-firestore/commit/745b608a7883a27ccb1c4d1f7800fdcc9a7917b1))
+
 ### [4.14.2](https://www.github.com/googleapis/nodejs-firestore/compare/v4.14.1...v4.14.2) (2021-08-17)
 
 

package.json

@@ -1,7 +1,7 @@
 {
   "name": "@google-cloud/firestore",
   "description": "Firestore Client Library for Node.js",
-  "version": "4.14.2",
+  "version": "4.15.0",
   "license": "Apache-2.0",
   "author": "Google Inc.",
   "engines": {

samples/package.json

@@ -11,7 +11,7 @@
     "test": "mocha --timeout 600000"
   },
   "dependencies": {
-    "@google-cloud/firestore": "^4.14.2"
+    "@google-cloud/firestore": "^4.15.0"
   },
   "devDependencies": {
     "chai": "^4.2.0",