fix: handle nested proxies after spreading and inserting into an array

[markerikson]

Updated the array plugin to to call handleCrossReference on values that have been added to an array. This fixes cases like:

const oldState = [{ nestedArray: [] }];

const newState = produce(oldState, (state) => {
  const newVal = { ...state[0] };
  state.push(newVal);
});

Fixes #1209

[github-actions]

🎉 This PR is included in version 11.1.4 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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