fix(deps): update dependency @google-cloud/spanner to v5 (#1805)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [@google-cloud/spanner](https://togithub.com/googleapis/nodejs-spanner) | dependencies | major | [`^4.0.0` -> `^5.0.0`](https://renovatebot.com/diffs/npm/@google-cloud%2fspanner/4.8.0/5.0.0) |

---

### Release Notes

<details>
<summary>googleapis/nodejs-spanner</summary>

### [`v5.0.0`](https://togithub.com/googleapis/nodejs-spanner/blob/master/CHANGELOG.md#&#8203;500-httpswwwgithubcomgoogleapisnodejs-spannercomparev480v500-2020-05-14)

[Compare Source](https://togithub.com/googleapis/nodejs-spanner/compare/v4.8.0...v5.0.0)

##### ⚠ BREAKING CHANGES

-   **types:** properly format listing methods with gaxOptions ([#&#8203;925](https://togithub.com/googleapis/nodejs-spanner/issues/925))
-   **types:** types for createInstance ([#&#8203;805](https://togithub.com/googleapis/nodejs-spanner/issues/805))
-   add typings for top level object ([#&#8203;781](https://togithub.com/googleapis/nodejs-spanner/issues/781))
-   **deps:** update dependency [@&#8203;google-cloud/common](https://togithub.com/google-cloud/common) to v3 ([#&#8203;875](https://togithub.com/googleapis/nodejs-spanner/issues/875))
-   drop Node.js 8 support.

##### Features

-   add typings for top level object ([#&#8203;781](https://www.github.com/googleapis/nodejs-spanner/issues/781)) ([c2b6f68](https://www.github.com/googleapis/nodejs-spanner/commit/c2b6f685c2f36866ddaa434c923be417de0f89ec))
-   check status of long running operation by its name ([#&#8203;937](https://www.github.com/googleapis/nodejs-spanner/issues/937)) ([5035e11](https://www.github.com/googleapis/nodejs-spanner/commit/5035e11f55a28def0d524a8e6ea7671367cd345e))
-   run and runStream can return query stats ([#&#8203;857](https://www.github.com/googleapis/nodejs-spanner/issues/857)) ([1656e4f](https://www.github.com/googleapis/nodejs-spanner/commit/1656e4f14f0dd24f530f36ecf1ccf34b51e726fb))
-   spanner backup and restore support ([#&#8203;855](https://www.github.com/googleapis/nodejs-spanner/issues/855)) ([967903c](https://www.github.com/googleapis/nodejs-spanner/commit/967903c4152e283f5a09dbd1b8ab3c9bc66728d3))

##### Bug Fixes

-   **deps:** update dependency [@&#8203;google-cloud/common](https://togithub.com/google-cloud/common) to v3 ([#&#8203;875](https://www.github.com/googleapis/nodejs-spanner/issues/875)) ([f3da343](https://www.github.com/googleapis/nodejs-spanner/commit/f3da3430645ae277ae40410b6494ea8477937610))
-   **deps:** update dependency [@&#8203;google-cloud/paginator](https://togithub.com/google-cloud/paginator) to v3 ([#&#8203;871](https://www.github.com/googleapis/nodejs-spanner/issues/871)) ([d3b2f2c](https://www.github.com/googleapis/nodejs-spanner/commit/d3b2f2c48a21e41700877677bb2041b368773e36))
-   **deps:** update dependency [@&#8203;google-cloud/precise-date](https://togithub.com/google-cloud/precise-date) to v2 ([#&#8203;873](https://www.github.com/googleapis/nodejs-spanner/issues/873)) ([8e8b29c](https://www.github.com/googleapis/nodejs-spanner/commit/8e8b29c389d68d0f872726655c9022d899a3ea3c))
-   **deps:** update dependency [@&#8203;google-cloud/projectify](https://togithub.com/google-cloud/projectify) to v2 ([#&#8203;870](https://www.github.com/googleapis/nodejs-spanner/issues/870)) ([e77460b](https://www.github.com/googleapis/nodejs-spanner/commit/e77460b6cc005049833f206f3fa74fc722ee3536))
-   **deps:** update dependency [@&#8203;google-cloud/promisify](https://togithub.com/google-cloud/promisify) to v2 ([#&#8203;868](https://www.github.com/googleapis/nodejs-spanner/issues/868)) ([afe4b15](https://www.github.com/googleapis/nodejs-spanner/commit/afe4b1518aadee91fb339512470e550295f89c4d))
-   **types:** fix type of ReadRequest ([#&#8203;876](https://www.github.com/googleapis/nodejs-spanner/issues/876)) ([990fec2](https://www.github.com/googleapis/nodejs-spanner/commit/990fec20c482e11f48b8b7fbaacae8f395e93db9))
-   **types:** properly format listing methods with gaxOptions ([#&#8203;925](https://www.github.com/googleapis/nodejs-spanner/issues/925)) ([23958ae](https://www.github.com/googleapis/nodejs-spanner/commit/23958ae48f49306cf38755831db091fef16998fb))
-   delete old instances then create new instance ([#&#8203;955](https://www.github.com/googleapis/nodejs-spanner/issues/955)) ([96813f8](https://www.github.com/googleapis/nodejs-spanner/commit/96813f81913322f6c9a84aa9c7757029ce5f48eb))
-   remove eslint, update gax, fix generated protos, run the generator ([#&#8203;897](https://www.github.com/googleapis/nodejs-spanner/issues/897)) ([7cfba21](https://www.github.com/googleapis/nodejs-spanner/commit/7cfba215b436e997919a9816bd076c62cce90bbf))
-   remove src/common-grpc/operation.ts ([#&#8203;879](https://www.github.com/googleapis/nodejs-spanner/issues/879)) ([a30d2b4](https://www.github.com/googleapis/nodejs-spanner/commit/a30d2b47b2ccbbdf0d473281a4f76584c4850659)), closes [#&#8203;878](https://www.github.com/googleapis/nodejs-spanner/issues/878)
-   remove typescript conversion leftovers ([#&#8203;901](https://www.github.com/googleapis/nodejs-spanner/issues/901)) ([ccf1b61](https://www.github.com/googleapis/nodejs-spanner/commit/ccf1b61bcf060a72c35712c5d0e529fad9684724))
-   skip some tests when run against the emulator ([#&#8203;933](https://www.github.com/googleapis/nodejs-spanner/issues/933)) ([2d91757](https://www.github.com/googleapis/nodejs-spanner/commit/2d917575dade110cbb3418d5d48c6fd0e77fae63))
-   update spanner package in sample ([#&#8203;930](https://www.github.com/googleapis/nodejs-spanner/issues/930)) ([5624b7b](https://www.github.com/googleapis/nodejs-spanner/commit/5624b7bafb585adcbd0a7c9d53f728ff77afb1fa))
-   use DELETE FROM for consistency ([#&#8203;923](https://www.github.com/googleapis/nodejs-spanner/issues/923)) ([0854c70](https://www.github.com/googleapis/nodejs-spanner/commit/0854c70d810ea05e5077d4c1a801040347415cfd))
-   **types:** types for createInstance ([#&#8203;805](https://www.github.com/googleapis/nodejs-spanner/issues/805)) ([67b0f54](https://www.github.com/googleapis/nodejs-spanner/commit/67b0f54c65b51ff9cec313f67c4ea54dab7c8123))

##### Build System

-   drop node8 and convert to TypeScript ([#&#8203;888](https://www.github.com/googleapis/nodejs-spanner/issues/888)) ([4116f81](https://www.github.com/googleapis/nodejs-spanner/commit/4116f81ec9715fde14b48e0daa6930bb8c502dbe))

</details>

---

### Renovate configuration

:date: **Schedule**: At any time (no schedule defined).

:vertical_traffic_light: **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

:recycle: **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

:no_bell: **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR has been generated by [WhiteSource Renovate](https://renovate.whitesourcesoftware.com). View repository job log [here](https://app.renovatebot.com/dashboard#GoogleCloudPlatform/nodejs-docs-samples).

functions/spanner/package.json

@@ -15,7 +15,7 @@
     "test": "mocha test/*.test.js --timeout=20000"
   },
   "dependencies": {
-    "@google-cloud/spanner": "^4.0.0"
+    "@google-cloud/spanner": "^5.0.0"
   },
   "devDependencies": {
     "mocha": "^7.0.0",