New Pull Request Checklist

• I have read and understood the CONTRIBUTING guide

• I have read the Documentation

• I have searched for a similar pull request in the project and found none

• I have updated this branch with the latest master to avoid conflicts (via merge from master or rebase)

• I have added the required tests to prove the fix/feature I am adding

• I have updated the documentation (if necessary)

• I have run the tests and they pass

• I have run the lint and it passes (pod lib lint)

This merge request fixes / refers to the following issues: ...
#3776

Pull Request Description

Adds an @autoreleasepool to the DisplayLinkCallback to release any objects added to an AutoreleasePool during the callback thereby avoiding leaking the objects until the CVDisplayLink is closed.
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