Use namespaced classes

[physikerwelt]

It seems that namespaced classes got mandatory, recently

This extension uses still non-namespaced extensions

WikibaseExport/src/EntryPoints/MediaWikiHooks.php

Line 14 in 1bbeff1

use Title;

See
https://phabricator.wikimedia.org/T388624
for other examples

[JeroenDeDauw]

Also

[85700e784c9d837aafa222ac] /w/index.php?title=Template:Person&action=edit TypeError: ProfessionalWiki\WikibaseExport\EntryPoints\MediaWikiHooks::onAlternateEdit(): Argument #1 ($editPage) must be of type EditPage, MediaWiki\EditPage\EditPage given, called in /var/www/html/w/includes/HookContainer/HookContainer.php on line 155