revert mistakenly deleted line

Author: troosan

composer.json

@@ -49,7 +49,8 @@
         "php": ">=5.3.3",
         "ext-xml": "*",
         "zendframework/zend-escaper": "^2.2",
-        "zendframework/zend-stdlib": "^2.2 || ^3.0"
+        "zendframework/zend-stdlib": "^2.2 || ^3.0",
+        "phpoffice/common": "^0.2"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.8.36",