Merge pull request #109 from TouchInstinct/build_fix/carthage_invalid_download

workaround for invalid ZIP download

xcode/commonFastfile

@@ -10,7 +10,13 @@ private_lane :installDependencies do |options|
   end
 
   if File.exists? "../Cartfile"
-    carthage(command: "bootstrap", platform: "iOS")
+    begin
+      carthage(command: "bootstrap", platform: "iOS")
+    rescue
+      # workaround for https://github.com/Carthage/Carthage/issues/2298
+      sh("rm -rf ~/Library/Caches/org.carthage.CarthageKit")
+      carthage(command: "update", platform: "iOS")
+    end
   end
 
   cocoapods(