Remove cocoapods workaround, update required versions

Author: jakubvano

Podfile

@@ -22,13 +22,3 @@ end
 target 'SwinjectSimpleExampleTests' do
     testing_pods
 end
-
-post_install do |installer|
-    installer.pods_project.targets.each do |target|
-        target.build_configurations.each do |config|
-            # https://github.com/CocoaPods/CocoaPods/issues/5521
-            # Now that we've updated to Swift 3, ensure that CocoaPods specify the correct version setting for all targets
-            config.build_settings['SWIFT_VERSION'] = '3.0'
-        end
-    end
-end

README.md

@@ -6,8 +6,8 @@ This is an example project to demonstrate [dependency injection](https://en.wiki
 
 ## Requirements
 
-- Xcode 7
-- [CocoaPods](https://cocoapods.org) 0.38 or later
+- Xcode 8 or later
+- [CocoaPods](https://cocoapods.org) 1.1.0 or later
 
 ## Setup