DEV: move send => public_send in lib folder

This handles most of the cases in `lib` where we were using send instead
of public_send

lib/auth/auth_provider.rb

@@ -2,7 +2,7 @@ class Auth::AuthProvider
   include ActiveModel::Serialization
 
   def initialize(params = {})
-    params.each { |key, value| send "#{key}=", value }
+    params.each { |key, value| public_send "#{key}=", value }
   end
 
   def self.auth_attributes