Swallowed errors during comms with Archive-Node-API

[shimkiv]

During the events and actions fetching we rely on error variable to be defined by problematic response when in fact errors an array of errors is usually returned by GraphQL, example:

{
  "errors": [
    {
        "locations": [
            {
                "column": 3,
                "line": 13
            }
        ],
        "message": "Field \"actionState\" of type \"ActionStates!\" must have a selection of subfields. Did you mean \"actionState { ... }\"?"
    }
  ]
}

Thus, check like this or this won't result in error being thrown.
But then, the call execution will be interrupted by this or this lines when we're going to refer to undefined.