fix: change boolean columns to nullable (#166)

see https://docs.nextcloud.com/server/latest/developer_manual/app_publishing_maintenance/upgrade-guide.html#boolean-database-columns

lib/Migration/Version000000Date20200416124731.php

@@ -54,7 +54,7 @@ class Version000000Date20200416124731 extends SimpleMigrationStep {
 				'notnull' => false,
 			]);
 			$table->addColumn('record', 'boolean', [
-				'notnull' => true,
+				'notnull' => false,
 			]);
 
 			$table->setPrimaryKey(['id']);

lib/Migration/Version000000Date20200617055735.php

@@ -26,7 +26,7 @@ class Version000000Date20200617055735 extends SimpleMigrationStep {
 
 			if (!$table->hasColumn('everyone_is_moderator')) {
 				$table->addColumn('everyone_is_moderator', 'boolean', [
-					'notnull' => true,
+					'notnull' => false,
 					'default' => false,
 				]);
 			}

lib/Migration/Version000000Date20200826100844.php

@@ -47,7 +47,7 @@ class Version000000Date20200826100844 extends SimpleMigrationStep {
 				'default' => -1,
 			]);
 			$table->addColumn('allow_recording', 'boolean', [
-				'notnull' => true,
+				'notnull' => false,
 				'default' => true,
 			]);
 

lib/Migration/Version000000Date20200829112301.php

@@ -28,7 +28,7 @@ class Version000000Date20200829112301 extends SimpleMigrationStep {
 
 			if (!$table->hasColumn('require_moderator')) {
 				$table->addColumn('require_moderator', 'boolean', [
-					'notnull' => true,
+					'notnull' => false,
 					'default' => false,
 				]);
 			}

lib/Migration/Version000000Date20210419132000.php

@@ -28,21 +28,21 @@ class Version000000Date20210419132000 extends SimpleMigrationStep {
 
 			if (!$table->hasColumn('listen_only')) {
 				$table->addColumn('listen_only', 'boolean', [
-					'notnull' => true,
+					'notnull' => false,
 					'default' => true
 				]);
 			}
 
 			if (!$table->hasColumn('media_check')) {
 				$table->addColumn('media_check', 'boolean', [
-					'notnull' => true,
+					'notnull' => false,
 					'default' => true
 				]);
 			}
 
 			if (!$table->hasColumn('clean_layout')) {
 				$table->addColumn('clean_layout', 'boolean', [
-					'notnull' => true,
+					'notnull' => false,
 					'default' => false
 				]);
 			}