Update the demo Podfile to use https instead of ssh, fix CI-build

.travis.yml

@@ -27,8 +27,8 @@ before_install:
 script:
   - set -o pipefail
 
-#  - echo Check if the library described by the podspec can be built
-#  - pod lib lint
+ # - echo Check if the library described by the podspec can be built
+ # - pod lib lint
 
   - echo Build example
   - pod install --project-directory=Example

Example/Podfile

@@ -3,7 +3,7 @@ inhibit_all_warnings!
 
 target 'SDWebImageFLPlugin_Example' do
   pod 'SDWebImageFLPlugin', :path => '../'
-  pod 'SDWebImage/Core', :git => 'git@github.com:rs/SDWebImage.git', :branch => '5.x'
+  pod 'SDWebImage/Core', :git => 'https://github.com/rs/SDWebImage.git', :branch => '5.x'
 
   target 'SDWebImageFLPlugin_Tests' do
     inherit! :search_paths