fix(app): postinstall with umi.cli.js

packages/app/package.json

@@ -5,7 +5,7 @@
   "scripts": {
     "start": "umi dev",
     "build": "umi build",
-    "postinstall": "umi generate tmp",
+    "postinstall": "node ./umi.cli.js generate tmp",
     "test": "umi-test",
     "test:coverage": "umi-test --coverage"
   },

packages/app/umi.cli.js

@@ -0,0 +1,4 @@
+#!/usr/bin/env node
+
+require('v8-compile-cache');
+require('umi/lib/cli');