1.6.0

Enhancements

• Add .inc file extension to header file extensions.
  Dimitris Koutsogiorgas
  #597

• Extend API to allow specifying platform and deployment target for PBXAggregateTarget.
  Dimitris Koutsogiorgas
  #593

• Xcode 10 changes for test schemes.
  Jenn Kaplan
  #583

• Update default build settings for Xcode 10 beta 3.
  Samuel Giddins

• Allow parsing .xcconfig files that use ${inherited} with multiple
  definitions for the same key.
  Samuel Giddins

Bug Fixes

• Only require 'digest' once instead of per call to uuid_for_path.
  Eric Amorde
  #580

• Xcode 10 support for input file list and output file list.
  Dimitris Koutsogiorgas
  #7835

• Create new targets with the Xcode 10 default ordering for build phases.
  Samuel Giddins
  CocoaPods#7833

• Document param product_group of Project.new_target.
  janpio
  #594