警告文

[!] Your project does not explicitly specify the CocoaPods master specs repo. Since CDN is now used as the default, you may safely remove it from your repos directory via `pod repo remove master`. To suppress this warning please add `warn_for_unused_master_specs_repo => false` to your Podfile.

解決方法

install! 'cocoapods', :warn_for_unused_master_specs_repo => falseを最初の行に追加します。

  # Uncomment the next line to define a global platform for your project
  # platform :ios, '9.0'

+ install! 'cocoapods', :warn_for_unused_master_specs_repo => false

  target 'LicensePlist-Demo' do
    # Comment the next line if you don't want to use 
  dynamic frameworks
    use_frameworks!

    # Pods for LicensePlist-Demo
    pod 'LicensePlist'

  end