Merge pull request #4207 from naithar/fix/ios-sdk

[iOS] Update required Xcode/SDK version

development/compiling/compiling_for_ios.rst

@@ -10,7 +10,7 @@ Requirements
 
 -  SCons 3.0+ (you can install it via Homebrew or Macports, you should be able
    to run ``scons`` in a terminal when installed).
--  Xcode 10.0 (or later) with the iOS (10.0) SDK and the command line tools.
+-  Xcode 11.0 (or later) with the iOS (13.0) SDK and the command line tools.
 
 If you are building the ``master`` branch: