fix(deps): Update dependency @grpc/grpc-js to v1.13.4 (#103)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [@grpc/grpc-js](https://grpc.io/) ([source](https://redirect.github.com/grpc/grpc-node)) | devDependencies | patch | [`1.13.3` -> `1.13.4`](https://renovatebot.com/diffs/npm/@grpc%2fgrpc-js/1.13.3/1.13.4) |

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### Release Notes

<details>
<summary>grpc/grpc-node (@&#8203;grpc/grpc-js)</summary>

### [`v1.13.4`](https://redirect.github.com/grpc/grpc-node/releases/tag/%40grpc/grpc-js%401.13.4): @&#8203;grpc/grpc-js 1.13.4

[Compare Source](https://redirect.github.com/grpc/grpc-node/compare/@grpc/[email protected]...@grpc/[email protected])

-   Fix ability to set SNI with `ssl_target_name_override` option ([#&#8203;2956](https://redirect.github.com/grpc/grpc-node/issues/2956))

</details>

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