add method for dotenv v5 in check ExampleEnvironmentVariablesAreSet

src/Checks/ExampleEnvironmentVariablesAreSet.php

@@ -29,6 +29,9 @@ public function name(array $config): string
      */
     public function check(array $config): bool
     {
+        if (method_exists(Dotenv::class, 'createUnsafeImmutable')) {
+            return $this->checkForDotEnvV5();
+        }
         if (method_exists(Dotenv::class, 'createImmutable')) {
             return $this->checkForDotEnvV4();
         }
@@ -67,6 +70,23 @@ private function checkForDotEnvV4(): bool
         return $this->envVariables->isEmpty();
     }
 
+    /**
+     * Perform the verification of this check for DotEnv v5.
+     *
+     * @return bool
+     */
+    private function checkForDotEnvV5(): bool
+    {
+        $examples = Dotenv::createMutable(base_path(), '.env.example');
+        $actual = Dotenv::createMutable(base_path(), '.env');
+
+        $this->envVariables = Collection::make($examples->safeLoad())
+            ->diffKeys($actual->safeLoad())
+            ->keys();
+
+        return $this->envVariables->isEmpty();
+    }
+
     /**
      * The error message to display in case the check does not pass.
      *