Update Homebrew TAP formula: flow-php to version: 0.15.1 (#1614)

<h2>Change Log</h2>
<div id="change-log">
  <h4>Changed</h4>
  <ul id="changed">
    <li>Update Homebrew TAP formula: flow-php to version: 0.15.1</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/0.15.0/flow.phar"
-  sha256 "c3f595242186514112e8d3d0fd9c64cd2dc02f83989172f51d531195c60a3f18"
+  url "https://github.com/flow-php/flow/releases/download/0.15.1/flow.phar"
+  sha256 "8d784b4ca78cc7583149d39bf20d45e9ee95bc9fbf4a4824b23c0102c65e9e18"
   license "MIT"
 
   depends_on "php"