fix(deps): update dependency redis to ~4.7.0 (googleapis#5589)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [redis](https://togithub.com/redis/node-redis) | [`~4.6.0` -> `~4.7.0`](https://renovatebot.com/diffs/npm/redis/4.6.15/4.7.0) | [![age](https://developer.mend.io/api/mc/badges/age/npm/redis/4.7.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/redis/4.7.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/redis/4.6.15/4.7.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/redis/4.6.15/4.7.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>redis/node-redis (redis)</summary>

### [`v4.7.0`](https://togithub.com/redis/node-redis/compare/[email protected])

[Compare Source](https://togithub.com/redis/node-redis/compare/[email protected]@4.7.0)

</details>

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

@@ -16,7 +16,7 @@
     "@google-cloud/vision": "^4.3.0",
     "natural": "^7.0.0",
     "pureimage": "^0.4.0",
-    "redis": "~4.6.0",
+    "redis": "~4.7.0",
     "yargs": "^17.0.0"
   },
   "devDependencies": {