Issue #3172537 by andypost, mikelutz, Gábor Hojtsy, kim.pepper: Passing a...

Issue #3172537 by andypost, mikelutz, Gábor Hojtsy, kim.pepper: Passing a command as string when creating a "Symfony\Component\Process\Process" instance is deprecated since Symfony 4.2, pass it as an array of its arguments instead, or use the "Process::fromShellCommandline()" constructor if you need features provided