Update OCMock version to 3.5 in RC podspec. (#4887)
Update OCMock version to 3.5 in RC podspec. (#4887)

* Update OCMock to version 3.5 in RC podspec.

* Update changelog.

* Update to review comments.

firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk