VersionPress\Tests\Utils\WpVersionComparer::toSemVer PHP Method

    private static function toSemVer($v1)
    {
        $shortVersionMatcher = "/^(\\d\\.\\d)(-.*)?\$/";
        $matches = Strings::match($v1, $shortVersionMatcher);
        if ($matches) {
            return $matches[1] . ".0" . (isset($matches[2]) ? $matches[2] : "");
        }
        return $v1;
    }