DateTime instead of DateOnly, fixed warnings

SchengenVisaApi/Domains/ApplicantDomain/Applicant.cs

@@ -16,7 +16,7 @@ namespace Domains.ApplicantDomain
         public Passport Passport { get; set; } = null!;
 
         /// Date of birth of the <see cref="Applicant"/>
-        public DateOnly BirthDate { get; set; }
+        public DateTime BirthDate { get; set; }
 
         /// <see cref="Country"/> of birth of the <see cref="Applicant"/>
         public Country CountryOfBirth { get; set; } = null!;

SchengenVisaApi/Domains/ApplicantDomain/Passport.cs

@@ -11,9 +11,9 @@
         public string Issuer { get; set; } = null!;
 
         /// Date of issue
-        public DateOnly IssueDate { get; set; }
+        public DateTime IssueDate { get; set; }
 
         /// Date when the <see cref="Passport"/> expires
-        public DateOnly ExpirationDate { get; set; }
+        public DateTime ExpirationDate { get; set; }
     }
 }