Update Homebrew TAP formula: flow-php to version: 0.28.0

<h2>Change Log</h2>
<div id="change-log">
  <h4>Changed</h4>
  <ul id="changed">
    <li>Update Homebrew TAP formula: flow-php to version: 0.28.0</li>
  </ul>
</div>
<hr/>

<h2>Description</h2>

Created by https://github.com/mislav/bump-homebrew-formula-action

Author: norberttech

src/tools/homebrew/Formula/flow-php.rb

@@ -1,8 +1,8 @@
 class FlowPhp < Formula
   desc "Flow is a first and the most advanced PHP ETL framework"
   homepage "https://github.com/flow-php/flow"
-  url "https://github.com/flow-php/flow/releases/download/0.27.0/flow.phar"
-  sha256 "51c7621f45b811d4c9e1a6607d64d1bb70683915978a74a682585233c8216a42"
+  url "https://github.com/flow-php/flow/releases/download/0.28.0/flow.phar"
+  sha256 "5e279a62e6ccb7e26e5d0be99eeda914c36e0fe4bb2ffabee7cc19065ac0a283"
   license "MIT"
 
   depends_on "php"