composer update

vendor/aws/aws-sdk-php/composer.json

@@ -17,7 +17,7 @@
     },
     "require": {
         "php": ">=5.5",
-        "guzzlehttp/guzzle": "^5.3.1|^6.2.1",
+        "guzzlehttp/guzzle": "^5.3.3|^6.2.1",
         "guzzlehttp/psr7": "^1.4.1",
         "guzzlehttp/promises": "~1.0",
         "mtdowling/jmespath.php": "~2.2",
@@ -29,6 +29,8 @@
     "require-dev": {
         "ext-openssl": "*",
         "ext-dom": "*",
+        "ext-pcntl": "*",
+        "ext-sockets": "*",
         "phpunit/phpunit": "^4.8.35|^5.4.3",
         "behat/behat": "~3.0",
         "doctrine/cache": "~1.4",
@@ -40,6 +42,7 @@
     "suggest": {
         "ext-openssl": "Allows working with CloudFront private distributions and verifying received SNS messages",
         "ext-curl": "To send requests using cURL",
+        "ext-sockets": "To use client-side monitoring",
         "doctrine/cache": "To use the DoctrineCacheAdapter",
         "aws/aws-php-sns-message-validator": "To validate incoming SNS notifications"
     },