Revert back to 4.1.4 podspec due to dependency check

Author: paulsolt-ofsw

sf-geojson-ios.podspec

@@ -18,7 +18,7 @@ Pod::Spec.new do |s|
 
   s.frameworks = 'Foundation'
 
-  s.dependency 'sf-ios', '5.0.0'
-  # s.dependency 'sf-ios', '~> 4.1.4'
+  # s.dependency 'sf-ios', '5.0.0' 
+  s.dependency 'sf-ios', '~> 4.1.4'
 
 end