fix: straggling type hints

Author: Justintime50

test/EasyPost/BetaReferralCustomerTest.php

@@ -15,8 +15,8 @@ class BetaReferralCustomerTest extends \PHPUnit\Framework\TestCase
     public static function setUpBeforeClass(): void
     {
         TestUtil::setupVcrTests();
-        $referralCustomerProdApiKey = getenv('REFERRAL_CUSTOMER_PROD_API_KEY') !== false
-            ? getenv('REFERRAL_CUSTOMER_PROD_API_KEY') : '123';
+        $referralCustomerProdApiKey = (string)getenv('REFERRAL_CUSTOMER_PROD_API_KEY') !== false
+            ? (string)getenv('REFERRAL_CUSTOMER_PROD_API_KEY') : '123';
         self::$client = new EasyPostClient($referralCustomerProdApiKey);
     }
 

test/EasyPost/Fixture.php

@@ -24,8 +24,8 @@ public static function pageSize(): int
     public static function uspsCarrierAccountId(): string
     {
         // Fallback to the EasyPost PHP Client Library Test User USPS carrier account ID due to strict matching
-        $uspsCarrierAccountId = getenv('USPS_CARRIER_ACCOUNT_ID') !== false
-            ? getenv('USPS_CARRIER_ACCOUNT_ID') : 'ca_8dc116debcdb49b5a66a2ddee4612600';
+        $uspsCarrierAccountId = (string)getenv('USPS_CARRIER_ACCOUNT_ID') !== false
+            ? (string)getenv('USPS_CARRIER_ACCOUNT_ID') : 'ca_8dc116debcdb49b5a66a2ddee4612600';
 
         return $uspsCarrierAccountId;
     }

test/EasyPost/ReferralCustomerTest.php

@@ -19,11 +19,11 @@ class ReferralCustomerTest extends \PHPUnit\Framework\TestCase
     public static function setUpBeforeClass(): void
     {
         TestUtil::setupVcrTests();
-        $partnerUserProdApiKey = getenv('PARTNER_USER_PROD_API_KEY') !== false
-            ? getenv('PARTNER_USER_PROD_API_KEY') : '123';
+        $partnerUserProdApiKey = (string)getenv('PARTNER_USER_PROD_API_KEY') !== false
+            ? (string)getenv('PARTNER_USER_PROD_API_KEY') : '123';
         self::$client = new EasyPostClient($partnerUserProdApiKey);
-        self::$referralUserProdApiKey = getenv('REFERRAL_CUSTOMER_PROD_API_KEY') !== false
-            ? getenv('REFERRAL_CUSTOMER_PROD_API_KEY') : '123';
+        self::$referralUserProdApiKey = (string)getenv('REFERRAL_CUSTOMER_PROD_API_KEY') !== false
+            ? (string)getenv('REFERRAL_CUSTOMER_PROD_API_KEY') : '123';
     }
 
     /**