Restore MapsFactory::getLeafletLayerDefinitions(), removed in 14.0.0 - #937

Process completed with exit code 2.

Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires mediawiki/mediawiki-codesniffer 39.0.0 -> satisfiable by mediawiki/mediawiki-codesniffer[v39.0.0]. - mediawiki/mediawiki-codesniffer v39.0.0 requires squizlabs/php_codesniffer 3.6.2 -> found squizlabs/php_codesniffer[3.6.2] but these were not loaded, because they are affected by security advisories ("PKSA-rdkp-vv9z-mjkg"). Go to https://packagist.org/security-advisories/ to find advisory details. To ignore the advisories, add their IDs to the "policy.advisories.ignore-id" config or add the package to "policy.advisories.ignore". To turn the feature off entirely, you can set "policy.advisories.block" to false.