Added CloudWatchLogs client (#543)

* Added CloudWatchLogs client

* Fixed typo

* Added docs for CloudWatchLogs

Author: guillaumesmo

src/AwsClientFactory.php

@@ -5,6 +5,7 @@
 namespace AsyncAws\Core;
 
 use AsyncAws\CloudFormation\CloudFormationClient;
+use AsyncAws\CloudWatchLogs\CloudWatchLogsClient;
 use AsyncAws\CodeDeploy\CodeDeployClient;
 use AsyncAws\CognitoIdentityProvider\CognitoIdentityProviderClient;
 use AsyncAws\Core\Credentials\CacheProvider;
@@ -98,6 +99,19 @@ public function cloudFormation(): CloudFormationClient
         return $this->serviceCache[__METHOD__];
     }
 
+    public function cloudWatchLogs(): CloudWatchLogsClient
+    {
+        if (!class_exists(CloudWatchLogsClient::class)) {
+            throw MissingDependency::create('async-aws/cloud-watch-logs', 'CloudWatchLogs');
+        }
+
+        if (!isset($this->serviceCache[__METHOD__])) {
+            $this->serviceCache[__METHOD__] = new CloudWatchLogsClient($this->configuration, $this->credentialProvider, $this->httpClient, $this->logger);
+        }
+
+        return $this->serviceCache[__METHOD__];
+    }
+
     public function codeDeploy(): CodeDeployClient
     {
         if (!class_exists(CodeDeployClient::class)) {