Update app and tooling

node_modules/micro/lib/handler.js

@@ -0,0 +1,24 @@
+// Utilities
+const logError = require('./error');
+
+module.exports = async file => {
+	let mod;
+
+	try {
+		mod = await require(file); // Await to support exporting Promises
+
+		if (mod && typeof mod === 'object') {
+			mod = await mod.default; // Await to support es6 module's default export
+		}
+	} catch (err) {
+		logError(`Error when importing ${file}: ${err.stack}`, 'invalid-entry');
+		process.exit(1);
+	}
+
+	if (typeof mod !== 'function') {
+		logError(`The file "${file}" does not export a function.`, 'no-export');
+		process.exit(1);
+	}
+
+	return mod;
+};