Adding source for cocoapods specs

Author: github-antoine-barrault

Podfile

@@ -1,7 +1,8 @@
-project 'TeadsSampleApp.xcodeproj'
+source 'https://github.com/CocoaPods/Specs.git'
 
+project 'TeadsSampleApp.xcodeproj'
 # Uncomment the next line to define a global platform for your project
- platform :ios, '10.0'
+platform :ios, '10.0'
 
 target 'TeadsSampleApp' do
   # Comment the next line if you're not using Swift and don't want to use dynamic frameworks