fix HLR lookup gsm_code type mismatch

Changes:
- Change LookupHlr::$gsmCode type from ?string to ?int
- Update tests to expect integer instead of string
- Fix README HLR example to use correct method names

The API now consistently returns gsm_code as integer (previously string),
causing TypeError in strict_types mode. This aligns with GSM error code
standard which uses numeric values (0 = no error, 1-255 = error codes).

Author: cl77

README.md

@@ -117,10 +117,13 @@ $response = $smsResource->dispatch($params);
 use Seven\Api\Resource\Lookup\LookupResource;
 
 $lookupResource = new LookupResource($client);
-$result = $lookupResource->hlr('+491234567890');
+$results = $lookupResource->hlr('+491234567890');
+$hlr = $results[0];
 
-echo "Carrier: " . $result->getCarrier();
-echo "Country: " . $result->getCountry();
+echo "Current Carrier: " . $hlr->getCurrentCarrier()->getName() . "\n";
+echo "Country: " . $hlr->getCountryName() . "\n";
+echo "Reachable: " . $hlr->getReachable() . "\n";
+echo "Ported: " . $hlr->getPorted() . "\n";
 ```
 
 ### Check account balance

src/Resource/Lookup/LookupHlr.php

@@ -7,7 +7,7 @@ class LookupHlr {
     protected ?string $countryName;
     protected string|false $countryPrefix;
     protected Carrier $currentCarrier;
-    protected ?string $gsmCode;
+    protected ?int $gsmCode;
     protected ?string $gsmMessage;
     protected string $internationalFormatNumber;
     protected string $internationalFormatted;
@@ -59,7 +59,7 @@ public function getCurrentCarrier(): Carrier {
         return $this->currentCarrier;
     }
 
-    public function getGsmCode(): ?string {
+    public function getGsmCode(): ?int {
         return $this->gsmCode;
     }
 

tests/LookupTest.php

@@ -68,7 +68,7 @@ public function testHlr(): void {
         $this->assertNotEmpty($hlr->getCountryName());
         $this->assertNotEmpty($hlr->getCountryPrefix());
         $this->assertCarrier($hlr->getCurrentCarrier());
-        $this->assertIsString($hlr->getGsmCode());
+        $this->assertIsInt($hlr->getGsmCode());
         $this->assertNotEmpty($hlr->getGsmMessage());
         $this->assertNotEmpty($hlr->getInternationalFormatNumber());
         $this->assertNotEmpty($hlr->getInternationalFormatted());
@@ -107,7 +107,7 @@ public function testHlrFaulty(): void {
         $this->assertNull($hlr->getCountryName());
         $this->assertFalse($hlr->getCountryPrefix());
         $this->assertCarrier($hlr->getCurrentCarrier(), true);
-        $this->assertTrue($hlr->getGsmCode() === null || $hlr->getGsmCode() === '0');
+        $this->assertTrue($hlr->getGsmCode() === null || $hlr->getGsmCode() === 0);
         $this->assertTrue($hlr->getGsmMessage() === null || is_string($hlr->getGsmMessage()));
         $this->assertEmpty($hlr->getInternationalFormatNumber());
         $this->assertEmpty($hlr->getInternationalFormatted());