Chameleon skin 1.5 causes an error in maintenance/update.php
script:
MediaWiki 1.28.0 Updater mediawiki/chameleon-skin: 1.5.0 installed, 1.* required. Error: your composer.lock file is not up to date. Run "composer update" to install newer dependencies
Nor composer update
neither composer update --no-dev
helps.
I know something in composer.lock must be changed but I don't have an idea what exactly.
Please help!