chore(deps): update dependency lib.aspnetcore.serversentevents to v9 (#…

…23)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
|
[Lib.AspNetCore.ServerSentEvents](https://togithub.com/tpeczek/Lib.AspNetCore.ServerSentEvents)
| `8.3.1` -> `9.0.0` |
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|
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|
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|
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|

---

### Release Notes

<details>
<summary>tpeczek/Lib.AspNetCore.ServerSentEvents
(Lib.AspNetCore.ServerSentEvents)</summary>

###
[`v9.0.0`](https://togithub.com/tpeczek/Lib.AspNetCore.ServerSentEvents/blob/HEAD/CHANGELOG.md#LibAspNetCoreServerSentEvents-900)

- `IServerSentEventsClient.Disconnect` has been replaced by
`IServerSentEventsClient.DisconnectAsync`, which will attempt to
gracefully complete the underlying HTTP response when disconnecting a
client
-   Dropped support for .NET Core 3.1 and .NET 5

</details>

---

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MumbleApi/MumbleApi.csproj

@@ -13,7 +13,7 @@
       <PackageReference Include="Community.Microsoft.Extensions.Caching.PostgreSql" Version="4.0.4" />
       <PackageReference Include="EFCore.NamingConventions" Version="8.0.0-rc.2" />
       <PackageReference Include="Google.Cloud.Storage.V1" Version="4.7.0" />
-      <PackageReference Include="Lib.AspNetCore.ServerSentEvents" Version="8.3.1" />
+      <PackageReference Include="Lib.AspNetCore.ServerSentEvents" Version="9.0.0" />
       <PackageReference Include="LinqKit" Version="1.2.5" />
       <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.0" PrivateAssets="All" />
       <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="8.0.0" />