Dump `bigint` instead of `integer` with `limit: 8` for schema dumper

Before:

```ruby
create_table "big_numbers", force: :cascade do |t|
  t.integer "bigint_column", limit: 8
end
```

After:

```ruby
create_table "big_numbers", force: :cascade do |t|
  t.bigint "bigint_column"
end
```

2 files changed, 6 insertions, 6 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb
index 2209874d0a..9e653cd7c4 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb
@@ -57,11 +57,15 @@ module ActiveRecord
       private
 
       def schema_type(column)
-        column.type
+        if column.bigint?
+          :bigint
+        else
+          column.type
+        end
       end
 
       def schema_limit(column)
-        limit = column.limit
+        limit = column.limit unless column.bigint?
         limit.inspect if limit && limit != native_database_types[column.type][:limit]
       end
 
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb
index 5cb2bbbf18..19761618cf 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb
@@ -41,10 +41,6 @@ module ActiveRecord
           end
         end
 
-        def schema_limit(column)
-          super unless schema_type(column) == :bigserial
-        end
-
         def schema_expression(column)
           super unless column.serial?
         end