Add inferno in todoapp benchmark

bench/implementations/inferno/test/server.js

@@ -0,0 +1,15 @@
+const fs = require('fs');
+const path = require('path');
+const express = require('express');
+const learnJson = require('./learn.json');
+
+const learner = require.resolve('./learn.json');
+
+const app = express();
+const dir = path.resolve(__dirname, '..');
+
+app.use(express.static(dir));
+app.use('/learn.json', express.static(learner));
+app.use('/favicon.ico', function () {});
+
+app.listen(8000);