Updated javascript code prop to .readme file.

README.md

 
 ## Usage Example
 
+```javascript
 // Import convert module
 const document = require("./convert");
 
 // `.ppt,` `.pptx`, `.odp` and `.key` to pdf and/or image convert options
 const options = {
-libreofficeBin: "C:\\Program Files\\LibreOffice\\program\\soffice.exe", // This is optional if it is null it will find default installation path inn your OS
-sourceFile: "C:\\convert-pdf-img\\sample.pptx",
-outputDir: "C:\\convert-pdf-img\\abc",
-img: true,
-imgExt: "jpg",
-reSize: 800,
-density: 120,
+  libreofficeBin: "C:\\Program Files\\LibreOffice\\program\\soffice.exe", // This is optional if it is null it will find default installation path inn your OS
+  sourceFile: "C:\\convert-pdf-img\\sample.pptx",
+  outputDir: "C:\\convert-pdf-img\\abc",
+  img: true,
+  imgExt: "jpg",
+  reSize: 800,
+  density: 120,
 };
 
 // Document (`.ppt,` `.pptx`, `.odp` and `.key`) to pdf and/or image convert options
 
 const options = {
-libreofficeBin: "C:\\Program Files\\LibreOffice\\program\\soffice.exe", // This is optional if it is null it will find default installation path inn your OS
-sourceFile: "C:\\convert-pdf-img\\sample.pdf",
-outputDir: "C:\\convert-pdf-img\\",
-img: true,
-imgExt: "jpg",
-reSize: 800,
-density: 120,
+  libreofficeBin: "C:\\Program Files\\LibreOffice\\program\\soffice.exe", // This is optional if it is null it will find default installation path inn your OS
+  sourceFile: "C:\\convert-pdf-img\\sample.pdf",
+  outputDir: "C:\\convert-pdf-img\\",
+  img: true,
+  imgExt: "jpg",
+  reSize: 800,
+  density: 120,
 };
 
 // Convert document to pdf and/or image
 document.convert(options, (err, res) => {
-if (err) console.log(err.message);
-console.log(res);
+  if (err) console.log(err.message);
+  console.log(res);
 });
+```