Fixed installHyperfScript does not work. (#36)

* fix install script

修复安装脚本时区输入n时date_default_timezone_set报错问题

* Update OptionalPackages.php

* Optimized code.

Co-authored-by: 李铭昕 <[email protected]>

Author: xiaoguo0426

installer/OptionalPackages.php

@@ -127,8 +127,8 @@ public function installHyperfScript()
         $ask[] = "Make your selection or type a time zone name, like Asia/Shanghai (n):\n";
         $answer = $this->io->ask(implode('', $ask), 'n');
 
-        if (! empty($answer) || $answer != 'n') {
-            $content = file_get_contents($this->installerSource . '/resources/bin/hyperf.php');
+        $content = file_get_contents($this->installerSource . '/resources/bin/hyperf.stub');
+        if ($answer != 'n') {
             $content = str_replace('%TIME_ZONE%', $answer, $content);
             file_put_contents($this->projectRoot . '/bin/hyperf.php', $content);
         }