Update check-id-card.uts

uni_modules/uni-id-pages-x/lib/check-id-card.uts

 function checkIdCard (idCardNumber: string): boolean {
-  if (typeof idCardNumber !== 'string' || idCardNumber.length !== 18) return false
+  if (typeof idCardNumber != 'string' || (idCardNumber.length as number) != 18) return false
 
   const coefficient = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2]
   const checkCode = [1, 0, 'x', 9, 8, 7, 6, 5, 4, 3, 2]