Podfile

platform :ios, '11.0'
use_frameworks!

target 'Beacon' do
  pod 'BlueCapKit', :path => '../..'
end

post_install do |installer|
  installer.pods_project.targets.each do |target|
    puts "TARGET: #{target.name}"
    target.build_configurations.each do |config|
      puts "SETTING CONFIG: #{config.name}"
      config.build_settings['SWIFT_VERSION'] = '3.0'
      puts "config.build_settings['SWIFT_VERSION']: #{config.build_settings['SWIFT_VERSION']}"
      if config.name == 'Debug'
        config.build_settings['OTHER_SWIFT_FLAGS'] = '-DDEBUG'
        puts "config.build_settings['OTHER_SWIFT_FLAGS']: #{config.build_settings['OTHER_SWIFT_FLAGS']}"
      end
    end
  end
end