fix migration script: missing primary key for auto increment field causing MySQL complaints

Signed-off-by: Julien Veyssier <eneiluj@posteo.net>

lib/Migration/Version000009Date20190625000800.php

@@ -60,7 +60,8 @@ class Version000009Date20190516000800 extends SimpleMigrationStep {
 			$table->addColumn('looked_up', 'boolean', [
 				'notnull' => true,
 			]);
-			$table->addUniqueIndex(["adr", "adr_norm"]);
+			$table->setPrimaryKey(['id']);
+			$table->addUniqueIndex(['adr', 'adr_norm']);
 		}
 
 		return $schema;