Use explicit 'PHP_EOL' in wordwrap

[paulbalandan]

Description
Running CLITest on Windows will likely fail on the testWrap method giving this error message:

Upon investigation, this was because CLI::wrap uses the wordwrap function and sets the third parameter into its default value of \n instead of the platform-specific PHP_EOL. This PR adds that.

Checklist:

• Securely signed commits
• Component(s) with PHPdocs
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[michalsn]

Thanks!