Updating extensions for iOS 14
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What has changed in iOS 14? (Classes, frameworks, etc.)
Icon layout handling changes
All functions in the IMMessage class that start with "instantMessageWithText" now take an extra parameter, "threadIdentifier". For a message that's not replying to a specific thread, you can just pass in nil for this parameter.
don't use Xcode 12 if you support lower than iOS 14 and arm64e
Generated binary for arm64e by Xcode 12 is changed ABI version to 0x80 (128).
Compiler ignore your minimum deployment version configuration. (I'm not sure how to resolve it in Xcode 12)