fix: update birthDate type in IPerson interface and adjust cleanUpPerson function

src/helpers/person.helper.ts

@@ -11,7 +11,7 @@ export const cleanUpPerson = (person: IAPIPerson, skipMock?: boolean): IPerson =
   return {
     ...person,
     thumbnailPath: PERSON_THUBNAIL_PATH(person.id),
-    birthDate: person.birthDate ? new Date(person.birthDate) : null,
+    birthDate: person.birthDate,
     updatedAt: new Date(person.updatedAt),
   }
 }

src/types/person.d.ts

@@ -1,7 +1,7 @@
 export interface IPerson {
   id:            string;
   name:          string;
-  birthDate:     Date | null;
+  birthDate:     string | null;
   thumbnailPath: string;
   isHidden:      boolean;
   updatedAt:     Date;