Update shared.js

Author: sjoshi10

lib/shared.js

@@ -1,9 +1,11 @@
 const Appdir = require('appdirectory');
 const rimraf = require('rimraf');
-const md5File = require('md5-file');
+//const md5File = require('md5-file');
 const glob = require('glob-all');
 const path = require('path');
 const fse = require('fs-extra');
+const sha256File = require('sha256-file');
+
 
 /**
  * This helper will check if we're using static cache and have max
@@ -101,7 +103,7 @@ function getUserCachePath(options) {
  * @return {string}
  */
 function md5Path(fullpath) {
-  return md5File.sync(fullpath);
+  return sha256File(fullpath);
 }
 
 module.exports = {