🐛 Bug Report

Query fails with DeserializationError: Object contains forbidden prototype property.

This started happening when we upgraded from v7.3 to v7.11. This PR seems to be the cause: #1110

To Reproduce

Issue a query that results in constructor being an object key in the JSON response. In our case it was detected in a request to the Term Vectors API, but I guess it can happen in many other places, like in an aggregation named constructor, etc. Example from the Term Vectors API response that affected us:

{
  "constructor": {
    "doc_freq": 1,
    "ttf": 1,
    "term_freq": 1
  }
}

See #1110 (comment) for a full example.

Expected behavior

No errors thrown from a perfectly valid response.

Your Environment

• node version: 14
• @elastic/elasticsearch version: 7.11
• os: Linux