fix(deps): update dependency google/cloud-tools to ^0.12.0 (GoogleCloudPlatform#1325)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [google/cloud-tools](https://togithub.com/GoogleCloudPlatform/php-tools) | require | minor | `^0.9.1` -> `^0.12.0` |

---

### Release Notes

<details>
<summary>GoogleCloudPlatform/php-tools</summary>

### [`v0.12.0`](https://togithub.com/GoogleCloudPlatform/php-tools/releases/v0.12.0)

[Compare Source](https://togithub.com/GoogleCloudPlatform/php-tools/compare/v0.11.0...v0.12.0)

#### Features

-   add support for Twig v3 ([#&#8203;82](https://togithub.com/GoogleCloudPlatform/php-tools/issues/82))

### [`v0.11.0`](https://togithub.com/GoogleCloudPlatform/php-tools/releases/v0.11.0)

[Compare Source](https://togithub.com/GoogleCloudPlatform/php-tools/compare/v0.10.0...v0.11.0)

#### Fixes

-   **Backwards-Breaking**: remove deprecated `app-engine-php` component from `gcloud` install ([#&#8203;83](https://togithub.com/GoogleCloudPlatform/php-tools/issues/83))

### [`v0.10.0`](https://togithub.com/GoogleCloudPlatform/php-tools/releases/v0.10.0)

[Compare Source](https://togithub.com/GoogleCloudPlatform/php-tools/compare/v0.9.1...v0.10.0)

#### Features

-   feat: support for Guzzle 7.x ([#&#8203;80](https://togithub.com/GoogleCloudPlatform/php-tools/issues/80))
-   feat: support for symfony/console v5 ([#&#8203;79](https://togithub.com/GoogleCloudPlatform/php-tools/issues/79))
-   feat: `CloudRun` gcloud wrapper ([#&#8203;71](https://togithub.com/GoogleCloudPlatform/php-tools/issues/71))
-   feat: `DeploymentTrait` ([#&#8203;59](https://togithub.com/GoogleCloudPlatform/php-tools/issues/59))
-   feat: install options for `install_test_deps.sh` script ([#&#8203;67](https://togithub.com/GoogleCloudPlatform/php-tools/issues/67))
-   feat: ability to combine backoffs ([#&#8203;66](https://togithub.com/GoogleCloudPlatform/php-tools/issues/66))
-   feat: flag in gcloud wrapper to allow for running `gcloud beta` ([#&#8203;64](https://togithub.com/GoogleCloudPlatform/php-tools/issues/64))
-   feat: `runSnippets` function to `TestTrait` ([#&#8203;61](https://togithub.com/GoogleCloudPlatform/php-tools/issues/61))

#### Fixes

-   fix: update to only use maintained versions of symfony ([#&#8203;74](https://togithub.com/GoogleCloudPlatform/php-tools/issues/74))
-   fix: only set cwd in ExecuteCommandTrait when it exists ([#&#8203;78](https://togithub.com/GoogleCloudPlatform/php-tools/issues/78))
-   fix: remove [@&#8203;beforeClass](https://togithub.com/beforeClass) from AppEngineDeploymentTrait::deployApp ([#&#8203;72](https://togithub.com/GoogleCloudPlatform/php-tools/issues/72))
-   fix: renames .php_cs to .php_cs.dist ([#&#8203;62](https://togithub.com/GoogleCloudPlatform/php-tools/issues/62))
-   test: Add PHP 7.2 and 7.3 to travis testing ([#&#8203;65](https://togithub.com/GoogleCloudPlatform/php-tools/issues/65))

</details>

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appengine/flexible/wordpress/composer.json

@@ -4,11 +4,10 @@
         "ext-zip": "*",
         "paragonie/random_compat": "^1.3",
         "symfony/console": "^3.0",
-        "google/cloud-tools": "^0.9.1"
+        "google/cloud-tools": "^0.12.0"
     },
     "require-dev": {
-        "guzzlehttp/guzzle": "~6.0",
-        "symfony/browser-kit": "~2"
+        "guzzlehttp/guzzle": "~6.0"
     },
     "autoload-dev": {
         "psr-4": {