fix: permissions for the browser CLI (#9731)

packages/browsers/package.json

@@ -13,7 +13,7 @@
   },
   "wireit": {
     "build": {
-      "command": "tsc -b",
+      "command": "tsc -b && chmod a+x lib/cjs/browsers.js lib/esm/browsers.js",
       "files": [
         "src/**/*.ts",
         "tsconfig.json"

packages/browsers/src/CLI.ts

@@ -149,6 +149,8 @@ export class CLI {
         choices: Object.values(BrowserPlatform),
         defaultDescription: 'Auto-detected by default.',
       })
+      .demandCommand(1)
+      .help()
       .parse();
   }