fix cross-realm array handling in dequal

[faizanu94]

This pull request resolves Issue #9, which identifies a problem with dequal failing to handle comparisons of objects created in different realms (e.g., arrays from iframes or VM contexts).

Changes

• Updated src/index.js and src/lite.js to use cross-realm-safe methods.
• Added a test for cross-realm arrays to the test suite using Node.js’s vm module.

Testing

• Verified that all existing tests pass.
• Confirmed the added cross-realm test fails with the old implementation and passes with the new logic.

Impact This fix ensures dequal handles edge cases involving cross-realm objects, improving reliability in multi-realm environments.