fix linting

add routename in privider

lib/db/database.dart

@@ -51,9 +51,9 @@ class Db {
   /// get db size in bytes
   Future<int> getDbSize() async {
     final int cnt = (await Db().db().rawQuery("pragma page_count;"))[0]
-    ["page_count"] as int;
+        ["page_count"] as int;
     final int pagesize =
-    (await Db().db().rawQuery("pragma page_size;"))[0]["page_size"] as int;
+        (await Db().db().rawQuery("pragma page_size;"))[0]["page_size"] as int;
     return cnt * pagesize;
   }