SQLiteJournal: speed up cache writing, prevent database locked error (#…

…66)

src/Caching/Storages/SQLiteJournal.php

@@ -59,6 +59,7 @@ private function open(): void
 			CREATE UNIQUE INDEX IF NOT EXISTS idx_tags_key_tag ON tags(key, tag);
 			CREATE UNIQUE INDEX IF NOT EXISTS idx_priorities_key ON priorities(key);
 			CREATE INDEX IF NOT EXISTS idx_priorities_priority ON priorities(priority);
+			PRAGMA synchronous = NORMAL;
 		');
 	}