Add filter for event name in eventsInRange GQL query

[nikugogoi]

Part of https://www.notion.so/Handle-galaxy-star-ownership-transfers-1b4a6b22d47280039403d25edf479948

✗ curl 'http://localhost:3001/graphql' \
  -H 'content-type: application/json' \
  --data-raw '{"query":"{\n  eventsInRange(fromBlockNumber: 6839505, toBlockNumber: 6839506, name: \"OwnerChanged\") {\n    block {\n      number\n    }\n    event {\n      __typename\n    }\n  }\n}","variables":{"fromBlockNumber":6839505,"toBlockNumber":6839506}}' | jq

{
  "data": {
    "eventsInRange": [
      {
        "block": {
          "number": 6839506
        },
        "event": {
          "__typename": "OwnerChangedEvent"
        }
      },
      {
        "block": {
          "number": 6839506
        },
        "event": {
          "__typename": "OwnerChangedEvent"
        }
      },
      ...
    ]
  }
}