title: Composer missing libraries in Ubuntu 18.04
body: <p>I have installed composer but when I try to run <code>$ composer</code> I get the following error:</p>
  
  <blockquote>
    <p>php: error while loading shared libraries: libicui18n.so.55: cannot
    open shared object file: No such file or directory</p>
  </blockquote>
  
  <p>The <code>php -v</code> command returns:</p>
  
  <blockquote>
    <p>PHP 7.1.23-2+ubuntu18.04.1+deb.sury.org+1 (cli) (built: Oct 15 2018
    11:37:26) ( NTS ) Copyright (c) 1997-2018 The PHP Group Zend Engine
    v3.1.0, Copyright (c) 1998-2018 Zend Technologies
        with Zend OPcache v7.1.23-2+ubuntu18.04.1+deb.sury.org+1, Copyright (c) 1999-2018, by Zend Technologies</p>
  </blockquote>
  
  <p>I have tried to search for <code>libicu</code> in synaptic and I installed libicu60!</p>
  
  <p>However, <code>php composer.phar</code> works fine</p>