fix(deps): Update dependency @grpc/grpc-js to v1.13.4 (#285)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [@grpc/grpc-js](https://grpc.io/) ([source](https://redirect.github.com/grpc/grpc-node)) | dependencies | minor | [`1.12.6` -> `1.13.4`](https://renovatebot.com/diffs/npm/@grpc%2fgrpc-js/1.12.6/1.13.4) |

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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))

### [`v1.13.3`](https://redirect.github.com/grpc/grpc-node/releases/tag/%40grpc/grpc-js%401.13.3): @&#8203;grpc/grpc-js 1.13.3

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

-   Disable Nagle's algorithm ([#&#8203;2936](https://redirect.github.com/grpc/grpc-node/issues/2936))
-   Avoid calling `http2.getDefaultSettings` ([#&#8203;2937](https://redirect.github.com/grpc/grpc-node/issues/2937))

### [`v1.13.2`](https://redirect.github.com/grpc/grpc-node/releases/tag/%40grpc/grpc-js%401.13.2): @&#8203;grpc/grpc-js 1.13.2

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

-   Fix a bug that caused clients to be unable to connect through local proxies ([#&#8203;2933](https://redirect.github.com/grpc/grpc-node/issues/2933))

### [`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/@grpc/[email protected]...@grpc/[email protected])

-   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))

### [`v1.13.0`](https://redirect.github.com/grpc/grpc-node/releases/tag/%40grpc/grpc-js%401.13.0): @&#8203;grpc/grpc-js 1.13.0

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

#### Changelog

-   Add support for channel option `grpc-node.flow_control_window` to control HTTP/2 flow control window size ([#&#8203;2864](https://redirect.github.com/grpc/grpc-node/issues/2864) contributed by [@&#8203;rickihastings](https://redirect.github.com/rickihastings))
-   Show meaningful error messages more consistently when requests fail ([#&#8203;2868](https://redirect.github.com/grpc/grpc-node/issues/2868))
-   Add support for CIDR blocks in `no_proxy`environment variable ([#&#8203;2876](https://redirect.github.com/grpc/grpc-node/issues/2876) contributed by [@&#8203;melkouri](https://redirect.github.com/melkouri))
-   Fix a bug that caused server interceptor `sendMetadata` methods to not be called if the server interceptor did not explicitly send metadata ([#&#8203;2897](https://redirect.github.com/grpc/grpc-node/issues/2897))
-   Fix IPv6-mapped IPv4 address parsing in channelz, and represent them as IPv4 addresses ([#&#8203;2909](https://redirect.github.com/grpc/grpc-node/issues/2909))

#### Experimental API changes

Added:

-   `SecureConnector`
-   `SecureConnectResult`
-   `SUBCHANNEL_ARGS_EXCLUDE_KEY_PREFIX`
-   `Server#experimentalRegisterListenerToChannelz` protected method
-   `ServerexperimentalUnregisterListenerFromChannelz` protected method
-   `Server#experimentalCreateConnectionInjectorWithChannelzRef` protected method

Modified:

-   `LoadBalancer`: Removed the `ChannelCredentials` constructor argument
-   `LoadBalancer`: Removed the `ChannelOptions` constructor argument
-   `LoadBalancer#updateAddressList`: Replaced the `attributes` argument with one of type `ChannelOptions`.
-   `ChannelControlHelper#createSubchannel`: Removed the `ChannelCredentials` argument
-   `LeafLoadBalancer`: Removed the `ChannelCredentials` constructor argument

</details>

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