chore(deps): update dependency grpc-tools to v1.13.1 (#577)

This PR contains the following updates:

| Package | Change | Age | Confidence |
|---|---|---|---|
| [grpc-tools](https://grpc.io/)
([source](https://redirect.github.com/grpc/grpc-node)) | [`1.13.0` ->
`1.13.1`](https://renovatebot.com/diffs/npm/grpc-tools/1.13.0/1.13.1) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/grpc-tools/1.13.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/grpc-tools/1.13.0/1.13.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>grpc/grpc-node (grpc-tools)</summary>

###
[`v1.13.1`](https://redirect.github.com/grpc/grpc-node/releases/tag/%40grpc/grpc-js%401.13.1):
@&#8203;grpc/grpc-js 1.13.1

[Compare
Source](https://redirect.github.com/grpc/grpc-node/compare/bf26f6e3a62c55182b128ca06ad9f8f7ebc9681a...grpc-tools@1.13.1)

- Fix a bug that caused the `rejectUnauthorized` channel credentials
option to be handled incorrectly
([#&#8203;2926](https://redirect.github.com/grpc/grpc-node/issues/2926))
- Fix a bug that caused the client to never send retries if any
`retryThrottling` config was set
([#&#8203;2927](https://redirect.github.com/grpc/grpc-node/issues/2927))
- Fix a bug that caused clients to incorrectly send retries if the
feature was disabled by a channel option and a retry config was provided
([#&#8203;2927](https://redirect.github.com/grpc/grpc-node/issues/2927))

</details>

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