Update Go dependencies
Update go-cmp to latest:
+--------------------------+---------+-------------+--------+------------------+
| MODULE | VERSION | NEW VERSION | DIRECT | VALID TIMESTAMPS |
+--------------------------+---------+-------------+--------+------------------+
| github.com/google/go-cmp | v0.5.9 | v0.6.0 | true | true |
+--------------------------+---------+-------------+--------+------------------+