dolt: `information_schema.statistics` table is missing `cardinality` column values

Set up:

> create table t (id int primary key auto_increment, num int, index num_idx(num));
> insert into t (num) values (1),(1),(2),(4),(1);
> analyze table t;

MySQL:

mysql> select table_name, index_name, column_name, cardinality from information_schema.statistics where table_name = 't';
+------------+------------+-------------+-------------+
| TABLE_NAME | INDEX_NAME | COLUMN_NAME | CARDINALITY |
+------------+------------+-------------+-------------+
| t          | num_idx    | num         |           3 |
| t          | PRIMARY    | id          |           5 |
+------------+------------+-------------+-------------+

Dolt:

select table_name, index_name, column_name, cardinality from information_schema.statistics where table_name = 't';
+------------+------------+-------------+-------------+
| TABLE_NAME | INDEX_NAME | COLUMN_NAME | CARDINALITY |
+------------+------------+-------------+-------------+
| t          | PRIMARY    | id          | 0           |
| t          | num_idx    | num         | 0           |
+------------+------------+-------------+-------------+