Upgrade composer dependencies of events api client

composer.json

@@ -22,10 +22,10 @@
         "ext-mbstring": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "~4.8",
-        "satooshi/php-coveralls": "~1.0",
-        "squizlabs/php_codesniffer": "~2.6",
-        "friendsofphp/php-cs-fixer": "~1.12"
+        "phpunit/phpunit" : "^7.0",
+        "satooshi/php-coveralls": "~2.2",
+        "squizlabs/php_codesniffer": "~3.5",
+        "friendsofphp/php-cs-fixer": "~2.16"
     },
     "autoload": {
         "psr-4": { "jards\\eventsapiclient\\Swagger\\Client\\" : "lib/" }

lib/Configuration.php

@@ -733,7 +733,7 @@ class Configuration
     /**
      * Set certificate key file
      * @param string $certificatekey certificate key file
-     * @return \Swagger\Client\Configuration
+     * @return \jards\eventsapiclient\Swagger\Client\Configuration
      */
     public function setCertificateKey($certificatekey)
     {
@@ -753,7 +753,7 @@ class Configuration
     /**
      * Set passphrase for client certificate key file
      * @param string $passphrase passphrase for client certificate key file
-     * @return \Swagger\Client\Configuration
+     * @return \jards\eventsapiclient\Swagger\Client\Configuration
      */
     public function setCertificatePassphrase($passphrase)
     {

test/Api/EventsApiTest.php

@@ -41,7 +41,7 @@ use \jards\eventsapiclient\Swagger\Client\ObjectSerializer;
  * @author   Swagger Codegen team
  * @link     https://github.com/swagger-api/swagger-codegen
  */
-class EventsApiTest extends \PHPUnit_Framework_TestCase
+class EventsApiTest extends \PHPUnit\Framework\TestCase
 {
 
     /**

test/Model/ApplicationTest.php

@@ -39,7 +39,7 @@ namespace jards\eventsapiclient\Swagger\Client;
  * @author      Swagger Codegen team
  * @link        https://github.com/swagger-api/swagger-codegen
  */
-class ApplicationTest extends \PHPUnit_Framework_TestCase
+class ApplicationTest extends \PHPUnit\Framework\TestCase
 {
 
     /**

test/Model/EventTest.php

@@ -39,7 +39,7 @@ namespace jards\eventsapiclient\Swagger\Client;
  * @author      Swagger Codegen team
  * @link        https://github.com/swagger-api/swagger-codegen
  */
-class EventTest extends \PHPUnit_Framework_TestCase
+class EventTest extends \PHPUnit\Framework\TestCase
 {
 
     /**

test/Model/ProjectTest.php

@@ -39,7 +39,7 @@ namespace jards\eventsapiclient\Swagger\Client;
  * @author      Swagger Codegen team
  * @link        https://github.com/swagger-api/swagger-codegen
  */
-class ProjectTest extends \PHPUnit_Framework_TestCase
+class ProjectTest extends \PHPUnit\Framework\TestCase
 {
 
     /**