Get the latest validator set

Example response

{
  "validators": [
    {
      "address": "cosmosvaloper1depk54cuajgkzea6zpgkq36tnjwdzv4avv9cxd",
      "pub_key": "cosmosvalconspub1zcjduepq7sjfglw7ra4mjxpw4ph7dtdhdheh7nz8dfgl6t8u2n5szuuql9mqsrwquu",
      "power": "1000",
      "accum": "1000"
    }
  ]
}