fix(deps): update dependency @grpc/grpc-js to ~1.9.0 (#1486)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [@grpc/grpc-js](https://grpc.io/) ([source](https://github.com/grpc/grpc-node)) | [`~1.8.0` -> `~1.9.0`](https://renovatebot.com/diffs/npm/@grpc%2fgrpc-js/1.8.21/1.9.0) | [![age](https://developer.mend.io/api/mc/badges/age/npm/@grpc%2fgrpc-js/1.9.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/@grpc%2fgrpc-js/1.9.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/@grpc%2fgrpc-js/1.8.21/1.9.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@grpc%2fgrpc-js/1.8.21/1.9.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

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

### [`v1.9.0`](https://github.com/grpc/grpc-node/releases/tag/%40grpc/grpc-js%401.9.0): @&#8203;grpc/grpc-js 1.9.0

[Compare Source](https://github.com/grpc/grpc-node/compare/@grpc/grpc-js@1.8.21...@grpc/grpc-js@1.9.0)

-   Implement channel idle timeout and the channel option `grpc.client_idle_timeout_ms` ([#&#8203;2471](https://github.com/grpc/grpc-node/issues/2471))
-   Implement [gRFC A62: `pick_first`: sticky TRANSIENT_FAILURE and address order randomization](https://github.com/grpc/proposal/blob/master/A62-pick-first.md) ([#&#8203;2511](https://github.com/grpc/grpc-node/issues/2511))
-   Fix premature leaving of context due to improper `Http2ServerCallStream` handling ([#&#8203;2501](https://github.com/grpc/grpc-node/issues/2501) contributed by [@&#8203;CedricKassen](https://github.com/CedricKassen))
-   Add channel option `grpc-node.tls_enable_trace` to enable Node TLS tracing ([#&#8203;2507](https://github.com/grpc/grpc-node/issues/2507))
-   Cancel deadline timer on server when call is cancelled ([#&#8203;2508](https://github.com/grpc/grpc-node/issues/2508))

Experimental changes:

-   Added `grpc.experimental.createResolver`

</details>

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package.json

@@ -10,7 +10,7 @@
     "!build/src/**/*.map"
   ],
   "dependencies": {
-    "@grpc/grpc-js": "~1.8.0",
+    "@grpc/grpc-js": "~1.9.0",
     "@grpc/proto-loader": "^0.7.0",
     "@types/long": "^4.0.0",
     "abort-controller": "^3.0.0",