Modernised Usage example in README

Author: daniellockyer

README.md

@@ -69,21 +69,21 @@ See the [API documentation](https://github.com/TryGhost/node-sqlite3/wiki/API) i
 **Note:** the module must be [installed](#installing) before use.
 
 ``` js
-var sqlite3 = require('sqlite3').verbose();
-var db = new sqlite3.Database(':memory:');
+const sqlite3 = require('sqlite3').verbose();
+const db = new sqlite3.Database(':memory:');
 
-db.serialize(function() {
-  db.run("CREATE TABLE lorem (info TEXT)");
+db.serialize(() => {
+    db.run("CREATE TABLE lorem (info TEXT)");
 
-  var stmt = db.prepare("INSERT INTO lorem VALUES (?)");
-  for (var i = 0; i < 10; i++) {
-      stmt.run("Ipsum " + i);
-  }
-  stmt.finalize();
+    const stmt = db.prepare("INSERT INTO lorem VALUES (?)");
+    for (let i = 0; i < 10; i++) {
+        stmt.run("Ipsum " + i);
+    }
+    stmt.finalize();
 
-  db.each("SELECT rowid AS id, info FROM lorem", function(err, row) {
-      console.log(row.id + ": " + row.info);
-  });
+    db.each("SELECT rowid AS id, info FROM lorem", (err, row) => {
+        console.log(row.id + ": " + row.info);
+    });
 });
 
 db.close();