message: Fix incorrect typing on SdkConfig defaults
  It's not a partial anymore - it's a full-fledged object with proper types.
  Without this change, `SdkConfig.put(DEFAULTS)` is broken.
diff: @@ -22,7 +22,7 @@ import { IConfigOptions, ISsoRedirectOptions } from "./IConfigOptions";
  import { KeysWithObjectShape } from "./@types/common";
  // see element-web config.md for docs, or the IConfigOptions interface for dev docs
  -export const DEFAULTS: Partial<IConfigOptions> = {
  +export const DEFAULTS: IConfigOptions = {
  brand: "Element",
  integrations_ui_url: "https://scalar.vector.im/",
  integrations_rest_url: "https://scalar.vector.im/api",
  