Update PHP to 8.0

.travis.yml

@@ -13,6 +13,7 @@ matrix:
     - php: 7.2
     - php: 7.3
     - php: 7.4
+    - php: 8.0
     - php: nightly
   allow_failures:
     - php: nightly

composer.json

@@ -33,13 +33,13 @@
         }
     },
     "require": {
-        "php": "^7.2.5",
+        "php": "^7.2.5|8.0",
         "guzzlehttp/guzzle": "^7.0",
         "guzzlehttp/uri-template": "0.2",
         "justinrainbow/json-schema": "^5.2"
     },
     "require-dev": {
-        "phpunit/phpunit": "^6.5",
+        "phpunit/phpunit": "^8.0",
         "psr/log": "^1.0",
         "php-coveralls/php-coveralls": "^2.0",
         "jakub-onderka/php-parallel-lint": "^1.0",

src/Common/Transport/Middleware.php

@@ -20,7 +20,7 @@ public static function httpErrors(): callable
         return function (callable $handler) {
             return function ($request, array $options) use ($handler) {
                 return $handler($request, $options)->then(
-                    function (ResponseInterface $response) use ($request, $handler) {
+                    function (ResponseInterface $response) use ($request) {
                         if ($response->getStatusCode() < 400) {
                             return $response;
                         }

src/OpenStack.php

@@ -77,7 +77,7 @@ private function getDefaultIdentityService(array $options): Service
      *
      * @param array $options options that will be used in configuring the service
      */
-    public function computeV2(array $options = []): \OpenStack\Compute\v2\Service
+    public function computeV2(array $options = []): Compute\v2\Service
     {
         $defaults = ['catalogName' => 'nova', 'catalogType' => 'compute'];
 
@@ -89,7 +89,7 @@ public function computeV2(array $options = []): \OpenStack\Compute\v2\Service
      *
      * @param array $options options that will be used in configuring the service
      */
-    public function networkingV2(array $options = []): \OpenStack\Networking\v2\Service
+    public function networkingV2(array $options = []): Networking\v2\Service
     {
         $defaults = ['catalogName' => 'neutron', 'catalogType' => 'network'];
 
@@ -101,7 +101,7 @@ public function networkingV2(array $options = []): \OpenStack\Networking\v2\Serv
      *
      * @param array $options options that will be used in configuring the service
      */
-    public function networkingV2ExtLayer3(array $options = []): \OpenStack\Networking\v2\Extensions\Layer3\Service
+    public function networkingV2ExtLayer3(array $options = []): Networking\v2\Extensions\Layer3\Service
     {
         $defaults = ['catalogName' => 'neutron', 'catalogType' => 'network'];
 
@@ -113,7 +113,7 @@ public function networkingV2ExtLayer3(array $options = []): \OpenStack\Networkin
      *
      * @param array $options options that will be used in configuring the service
      */
-    public function networkingV2ExtSecGroups(array $options = []): \OpenStack\Networking\v2\Extensions\SecurityGroups\Service
+    public function networkingV2ExtSecGroups(array $options = []): Networking\v2\Extensions\SecurityGroups\Service
     {
         $defaults = ['catalogName' => 'neutron', 'catalogType' => 'network'];
 
@@ -125,7 +125,7 @@ public function networkingV2ExtSecGroups(array $options = []): \OpenStack\Networ
      *
      * @param array $options options that will be used in configuring the service
      */
-    public function identityV2(array $options = []): \OpenStack\Identity\v2\Service
+    public function identityV2(array $options = []): Identity\v2\Service
     {
         $defaults = ['catalogName' => 'keystone', 'catalogType' => 'identity'];
 
@@ -137,7 +137,7 @@ public function identityV2(array $options = []): \OpenStack\Identity\v2\Service
      *
      * @param array $options options that will be used in configuring the service
      */
-    public function identityV3(array $options = []): \OpenStack\Identity\v3\Service
+    public function identityV3(array $options = []): Service
     {
         $defaults = ['catalogName' => 'keystone', 'catalogType' => 'identity'];
 
@@ -149,7 +149,7 @@ public function identityV3(array $options = []): \OpenStack\Identity\v3\Service
      *
      * @param array $options options that will be used in configuring the service
      */
-    public function objectStoreV1(array $options = []): \OpenStack\ObjectStore\v1\Service
+    public function objectStoreV1(array $options = []): ObjectStore\v1\Service
     {
         $defaults = ['catalogName' => 'swift', 'catalogType' => 'object-store'];
 
@@ -161,7 +161,7 @@ public function objectStoreV1(array $options = []): \OpenStack\ObjectStore\v1\Se
      *
      * @param array $options options that will be used in configuring the service
      */
-    public function blockStorageV2(array $options = []): \OpenStack\BlockStorage\v2\Service
+    public function blockStorageV2(array $options = []): BlockStorage\v2\Service
     {
         $defaults = ['catalogName' => 'cinderv2', 'catalogType' => 'volumev2'];
 
@@ -173,7 +173,7 @@ public function blockStorageV2(array $options = []): \OpenStack\BlockStorage\v2\
      *
      * @param array $options options that will be used in configuring the service
      */
-    public function imagesV2(array $options = []): \OpenStack\Images\v2\Service
+    public function imagesV2(array $options = []): Images\v2\Service
     {
         $defaults = ['catalogName' => 'glance', 'catalogType' => 'image'];
 
@@ -183,7 +183,7 @@ public function imagesV2(array $options = []): \OpenStack\Images\v2\Service
     /**
      * Creates a new Gnocchi Metric service v1.
      */
-    public function metricGnocchiV1(array $options = []): \OpenStack\Metric\v1\Gnocchi\Service
+    public function metricGnocchiV1(array $options = []): Metric\v1\Gnocchi\Service
     {
         $defaults = ['catalogName' => 'gnocchi', 'catalogType' => 'metric'];