feat: support package

lib/pkg.js

@@ -0,0 +1,21 @@
+const app = require('./app');
+
+const pkg = (path) =>
+    new Promise((resolve) => {
+        app.callback()(
+            {
+                url: path,
+                method: 'GET',
+                headers: {},
+                socket: {},
+            },
+            {
+                setHeader: () => {},
+                end: (data) => {
+                    resolve(data);
+                },
+            }
+        );
+    });
+
+module.exports = pkg;