fix(validator): always emit value

projects/ngx-mat-input-tel/src/lib/ngx-mat-input-tel.validator.ts

@@ -1,26 +1,23 @@
-import { UntypedFormControl } from '@angular/forms'
+import { FormControl } from '@angular/forms'
 import { parsePhoneNumber, PhoneNumber } from 'libphonenumber-js'
 
-export const phoneNumberValidator = (control: UntypedFormControl) => {
+export const phoneNumberValidator = (control: FormControl) => {
   const error = { validatePhoneNumber: true }
   let numberInstance: PhoneNumber
 
   if (control.value) {
     try {
       numberInstance = parsePhoneNumber(control.value)
     } catch (e) {
-      control.setValue(null)
       return error
     }
 
     if (numberInstance && !numberInstance.isValid()) {
-      control.setValue(null)
       if (!control.touched) {
         control.markAsTouched()
       }
       return error
     }
   }
-
   return null
 }