chore: release 5.9.0 (googleapis#1399)

🤖 I have created a release \*beep\* \*boop\*
---
## [5.9.0](https://www.github.com/googleapis/nodejs-spanner/compare/v5.8.1...v5.9.0) (2021-06-14)


### Features

* **spanner:** add processing_units to Instance resource ([googleapis#1398](https://www.github.com/googleapis/nodejs-spanner/issues/1398)) ([878cd3f](https://www.github.com/googleapis/nodejs-spanner/commit/878cd3f1596526b6e4e2457babd3dc2c2add11ad))
---


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 +4,13 @@
 
 [1]: https://www.npmjs.com/package/nodejs-spanner?activeTab=versions
 
+## [5.9.0](https://www.github.com/googleapis/nodejs-spanner/compare/v5.8.1...v5.9.0) (2021-06-14)
+
+
+### Features
+
+* **spanner:** add processing_units to Instance resource ([#1398](https://www.github.com/googleapis/nodejs-spanner/issues/1398)) ([878cd3f](https://www.github.com/googleapis/nodejs-spanner/commit/878cd3f1596526b6e4e2457babd3dc2c2add11ad))
+
 ### [5.8.1](https://www.github.com/googleapis/nodejs-spanner/compare/v5.8.0...v5.8.1) (2021-06-10)
 
 

package.json

@@ -1,7 +1,7 @@
 {
   "name": "@google-cloud/spanner",
   "description": "Cloud Spanner Client Library for Node.js",
-  "version": "5.8.1",
+  "version": "5.9.0",
   "license": "Apache-2.0",
   "author": "Google Inc.",
   "engines": {

samples/package.json

@@ -16,7 +16,7 @@
   "dependencies": {
     "@google-cloud/kms": "^2.1.3",
     "@google-cloud/precise-date": "^2.0.0",
-    "@google-cloud/spanner": "^5.8.1",
+    "@google-cloud/spanner": "^5.9.0",
     "yargs": "^16.0.0"
   },
   "devDependencies": {