Update reference to enum and set minimum PHP version to 7.1

Author: DivineOmega

composer.json

@@ -3,6 +3,7 @@
     "description": "Laravel validation rule that checks if a password has been exposed in a data breach",
     "type": "library",
     "require": {
+        "php": "^7.1",
         "divineomega/password_exposed": "^2.5||^3.0",
         "illuminate/contracts": "^5.1"
     },

src/PasswordExposed.php

@@ -3,8 +3,8 @@
 namespace DivineOmega\LaravelPasswordExposedValidationRule;
 
 use DivineOmega\LaravelPasswordExposedValidationRule\Factories\PasswordExposedCheckerFactory;
+use DivineOmega\PasswordExposed\Enums\PasswordStatus;
 use DivineOmega\PasswordExposed\PasswordExposedChecker;
-use DivineOmega\PasswordExposed\PasswordStatus;
 use Illuminate\Contracts\Validation\Rule;
 
 /**