[Security] Bump phpseclib/phpseclib from 2.0.25 to 2.0.31

Bumps [phpseclib/phpseclib](https://github.com/phpseclib/phpseclib) from 2.0.25 to 2.0.31. **This update includes a security fix.**
- [Release notes](https://github.com/phpseclib/phpseclib/releases)
- [Changelog](https://github.com/phpseclib/phpseclib/blob/master/CHANGELOG.md)
- [Commits](phpseclib/phpseclib@2.0.25...2.0.31)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Dump autoload with v1

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

composer.json

@@ -31,7 +31,7 @@
 		"patchwork/utf8": "1.3.1",
 		"pear/archive_tar": "1.4.12",
 		"pear/pear-core-minimal": "^v1.10",
-		"phpseclib/phpseclib": "2.0.25",
+		"phpseclib/phpseclib": "2.0.31",
 		"php-opencloud/openstack": "3.0.7",
 		"pimple/pimple": "3.2.3",
 		"psr/container": "^1.0",