feat: channel update support

[DaStormer]

Please describe the changes this PR makes and why it should be merged:

Added channel update methods, fixed some channel typings

Status

• [ ] Code changes have been tested.

Semantic versioning classification:

• [x] This PR changes the library's interface (methods or parameters added)
• [ ] This PR includes breaking changes (methods removed or renamed, parameters moved or removed)
• [ ] This PR only includes non-code changes, like changes to documentation, README, etc.

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 5fd676b659787ef505e3142614bb4d4beeb0b6f6

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 6 packages

| Name | Type | | ------------------------------ | ----- | | @guildedjs/guilded-api-typings | Minor | | guilded.js | Minor | | @guildedjs/rest | Minor | | @guildedjs/webhook-client | Patch | | @guildedjs/ws | Patch | | @guildedjs/gil | Patch |

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