composer require dolejska-daniel/riot-api Error

[MrLeRandom]

Describe the bug
Composer install error

Screenshots
root@vps-01:/var/www/api-riot/riot-api# composer require dolejska-daniel/riot-api
Using version ^3.0 for dolejska-daniel/riot-api
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)

Installation failed, reverting ./composer.json to its original content.

[ErrorException]
"continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"?

require [--dev] [--prefer-source] [--prefer-dist] [--no-plugins] [--no-progress] [--no-update] [--update-no-dev] [--update-with-dependencies] [--ignore-platform-reqs] [--sort-packages] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--] []...

Server (please complete the following information):
root@vps-01:/var/www/api-riot/riot-api# php -v
PHP 7.3.4-1+ubuntu16.04.1+deb.sury.org+3 (cli) (built: Apr 10 2019 10:50:34) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.4, Copyright (c) 1998-2018 Zend Technologies
with Zend OPcache v7.3.4-1+ubuntu16.04.1+deb.sury.org+3, Copyright (c) 1999-2018, by Zend Technologies
root@vps-01:/var/www/api-riot/riot-api#

[MrLeRandom]

PHP7.3 is broken .. downgrade 7.2 and is ok