fix: php notices in gutenberg 8.6.0

src/blocks/carousel/view.php

@@ -330,6 +330,7 @@ function newspack_blocks_register_carousel() {
 					),
 				),
 				'render_callback' => 'newspack_blocks_render_block_carousel',
+				'supports'        => [],
 			),
 			'carousel'
 		)

src/blocks/donate/view.php

@@ -254,6 +254,7 @@ function newspack_blocks_register_donate() {
 				],
 			),
 			'render_callback' => 'newspack_blocks_render_block_donate',
+			'supports'        => [],
 		)
 	);
 }

src/blocks/homepage-articles/view.php

@@ -178,6 +178,7 @@ function newspack_blocks_register_homepage_articles() {
 			array(
 				'attributes'      => $block['attributes'],
 				'render_callback' => 'newspack_blocks_render_block_homepage_articles',
+				'supports'        => [],
 			),
 			$block['name']
 		)

src/blocks/video-playlist/view.php

@@ -43,6 +43,7 @@ function newspack_blocks_register_video_playlist() {
 				),
 			),
 			'render_callback' => 'newspack_blocks_render_block_video_playlist',
+			'supports'        => [],
 		)
 	);
 }