Update phpword version

Author: phamviet

composer.json

@@ -12,11 +12,11 @@
     "html to docx word phpword h2d htmltodocx"
   ],
   "require": {
-    "phpoffice/phpword": "0.12.0"
+    "phpoffice/phpword": "^0.16"
   },
   "target-dir": "webonyx/htmltodocx",
 
   "autoload": {
     "classmap": ["lib/HtmlToDocx/"]
   }
-}
+}