Added new dir.

test/test.js

@@ -3,7 +3,7 @@ const document = require("../convert");
 const options = {
   libreofficeBin: "C:\\Program Files\\LibreOffice\\program\\soffice.exe",
   sourceFile: "C:\\convert-pdf-img\\metro_style_powerpoint_Dark.pptx",
-  outputDir: "C:\\convert-pdf-img\\",
+  outputDir: "C:\\convert-pdf-img\\files\\",
   img: true,
   imgExt: "jpg",
   reSize: 800,