Issue #2170775 by tim.plunkett, martin107, Xano: Remove array typehint from .

core/lib/Drupal/Component/Plugin/ContextAwarePluginBase.php

core/lib/Drupal/Component/Plugin/Factory/DefaultFactory.php

...lib/Drupal/Component/Plugin/Factory/ReflectionFactory.php

core/lib/Drupal/Component/Plugin/PluginBase.php

core/lib/Drupal/Core/Action/ConfigurableActionBase.php

core/lib/Drupal/Core/Field/FormatterBase.php

core/lib/Drupal/Core/Field/WidgetBase.php

core/lib/Drupal/Core/Menu/LocalActionDefault.php

...ib/Drupal/Core/Plugin/ContainerFactoryPluginInterface.php

core/lib/Drupal/Core/Plugin/ContextAwarePluginBase.php

...es/action/lib/Drupal/action/Plugin/Action/EmailAction.php

...les/action/lib/Drupal/action/Plugin/Action/GotoAction.php

.../action/lib/Drupal/action/Plugin/Action/MessageAction.php

...ib/Drupal/aggregator/Plugin/Block/AggregatorFeedBlock.php

...l/aggregator/Plugin/aggregator/fetcher/DefaultFetcher.php

...gregator/Plugin/aggregator/processor/DefaultProcessor.php

...gator/lib/Drupal/aggregator/Plugin/views/argument/Fid.php

...gator/lib/Drupal/aggregator/Plugin/views/argument/Iid.php

...egator_test/Plugin/aggregator/processor/TestProcessor.php

...lib/Drupal/custom_block/Plugin/Block/CustomBlockBlock.php