fix: correct types

Author: paoloricciuti

packages/svelte/src/ambient.d.ts

@@ -20,7 +20,11 @@ declare module '*.svelte' {
  *
  * @param initial The initial value
  */
-declare function $state<T>(initial?: T, options?: import('svelte').StateOptions): T;
+declare function $state<T>(
+	initial: undefined,
+	options?: import('svelte').StateOptions
+): T | undefined;
+declare function $state<T>(initial: T, options?: import('svelte').StateOptions): T;
 declare function $state<T>(initial: T): T;
 declare function $state<T>(): T | undefined;
 
@@ -117,6 +121,10 @@ declare namespace $state {
 	 *
 	 * @param initial The initial value
 	 */
+	export function raw<T>(
+		initial: undefined,
+		options?: import('svelte').StateOptions
+	): T | undefined;
 	export function raw<T>(initial?: T, options?: import('svelte').StateOptions): T;
 	export function raw<T>(initial: T): T;
 	export function raw<T>(): T | undefined;

packages/svelte/types/index.d.ts

@@ -2679,7 +2679,11 @@ declare module 'svelte/types/compiler/interfaces' {
  *
  * @param initial The initial value
  */
-declare function $state<T>(initial?: T, options?: import('svelte').StateOptions): T;
+declare function $state<T>(
+	initial: undefined,
+	options?: import('svelte').StateOptions
+): T | undefined;
+declare function $state<T>(initial: T, options?: import('svelte').StateOptions): T;
 declare function $state<T>(initial: T): T;
 declare function $state<T>(): T | undefined;
 
@@ -2776,6 +2780,10 @@ declare namespace $state {
 	 *
 	 * @param initial The initial value
 	 */
+	export function raw<T>(
+		initial: undefined,
+		options?: import('svelte').StateOptions
+	): T | undefined;
 	export function raw<T>(initial?: T, options?: import('svelte').StateOptions): T;
 	export function raw<T>(initial: T): T;
 	export function raw<T>(): T | undefined;