Dev:Updating extensions for iOS 14

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= What has changed in iOS 14? (Classes, frameworks, etc.) =

IMMessage instantMessageWithText
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.

= Toolchain =

Xcode 10-11 and 12 are necessary to support iOS 14 and 13- for arm64e by single package
arm64e ABI version is changed in iOS 14.

We must compile both arm64e ABI version slice to support iOS 14 and 13- using Xcode 10-11 and 12.

This topic for theos is under development thoes/issue#563