fix(deps): update dependency @netlify/serverless-functions-api to v1.19.1 (#514)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
|
[@netlify/serverless-functions-api](https://togithub.com/netlify/serverless-functions-api)
| [`1.19.0` ->
`1.19.1`](https://renovatebot.com/diffs/npm/@netlify%2fserverless-functions-api/1.19.0/1.19.1)
|
[![age](https://developer.mend.io/api/mc/badges/age/npm/@netlify%2fserverless-functions-api/1.19.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/@netlify%2fserverless-functions-api/1.19.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/@netlify%2fserverless-functions-api/1.19.0/1.19.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
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|

---

### Release Notes

<details>
<summary>netlify/serverless-functions-api
(@&#8203;netlify/serverless-functions-api)</summary>

###
[`v1.19.1`](https://togithub.com/netlify/serverless-functions-api/compare/9ac79412d3d3c69293992e4d4618723a4b53b210...99cf406c4b61d40681ed5981390296f2f64e56a0)

[Compare
Source](https://togithub.com/netlify/serverless-functions-api/compare/9ac79412d3d3c69293992e4d4618723a4b53b210...99cf406c4b61d40681ed5981390296f2f64e56a0)

</details>

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package-lock.json

@@ -79,7 +79,7 @@
     "test": "test"
   },
   "dependencies": {
-    "@netlify/serverless-functions-api": "1.19.0"
+    "@netlify/serverless-functions-api": "1.19.1"
   },
   "devDependencies": {
     "@arethetypeswrong/cli": "^0.15.0",