Travis checks failed

[indigoxela]

Seems to happen because of the composer version:

$ composer install

Installing dependencies from lock file (including require-dev)

Verifying lock file contents can be installed on current platform.

Your lock file does not contain a compatible set of packages. Please run composer update.

More info:

You are using Composer 2, which some of your plugins seem to be incompatible with. Make sure you update your plugins or report a plugin-issue to ask them to support Composer 2.

The command "composer install" failed and exited with 2 during .

Possible solution (didn't test): composer self-update --1