fix(deps): Update dependency @grpc/grpc-js to v1.12.5 (#85)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [@grpc/grpc-js](https://grpc.io/) ([source](https://togithub.com/grpc/grpc-node)) | devDependencies | patch | [`1.12.2` -> `1.12.5`](https://renovatebot.com/diffs/npm/@grpc%2fgrpc-js/1.12.2/1.12.5) |

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### Release Notes

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

### [`v1.12.5`](https://togithub.com/grpc/grpc-node/releases/tag/%40grpc/grpc-js%401.12.5): @&#8203;grpc/grpc-js 1.12.5

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

-   Prioritize HTTP status errors over message decoding errors ([#&#8203;2873](https://togithub.com/grpc/grpc-node/issues/2873))

### [`v1.12.4`](https://togithub.com/grpc/grpc-node/releases/tag/%40grpc/grpc-js%401.12.4): @&#8203;grpc/grpc-js 1.12.4

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

-   Prioritize reporting UNAVAILABLE status when handing connection drops ([#&#8203;2862](https://togithub.com/grpc/grpc-node/issues/2862))

### [`v1.12.3`](https://togithub.com/grpc/grpc-node/releases/tag/%40grpc/grpc-js%401.12.3): @&#8203;grpc/grpc-js 1.12.3

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

-   Report UNAVAILABLE if possible when handling connection drops ([#&#8203;2861](https://togithub.com/grpc/grpc-node/issues/2861))

</details>

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