Update appveyor.yml

Author: TheTechsTech

appveyor.yml

@@ -79,9 +79,9 @@ install:
     - IF %PHP%==1 echo extension=php_pdo_sqlite.dll >> php.ini
     - IF %PHP%==1 echo extension=php_mysqli.dll >> php.ini
     - IF %PHP%==1 echo extension=php_pdo_mysql.dll >> php.ini
-    - IF %PHP%==1 appveyor-retry appveyor DownloadFile https://xdebug.org/files/php_xdebug-2.6.0-7.1-vc14-nts-x86_64.dll -FileName c:\tools\php\ext\php_xdebug-2.6.0-7.1-vc14-nts-x86_64.dll
+    - IF %PHP%==1 appveyor-retry appveyor DownloadFile https://xdebug.org/files/php_xdebug-2.5.5-7.1-vc14-nts-x86_64.dll -FileName c:\tools\php\ext\php_xdebug-2.5.5-7.1-vc14-nts-x86_64.dll
     - IF %PHP%==1 echo [xdebug] >> php.ini
-    - IF %PHP%==1 echo zend_extension=php_xdebug-2.6.0-7.1-vc14-nts-x86_64.dll >> php.ini
+    - IF %PHP%==1 echo zend_extension=php_xdebug-2.5.5-7.1-vc14-nts-x86_64.dll >> php.ini
     - IF %PHP%==1 echo zend.assertions=1 >> php.ini
     - IF %PHP%==1 echo assert.exception=On >> php.ini
     - IF %PHP%==1 echo xdebug.remote_enable=1 >> php.ini