Use #where instead of #and for rails 5

In rails 4.x this passed around a set of arel conditions, in rails 5 it
passes around an AR::Relation and uses where().

See rails/rails@5f521cbff3c8a46cfc8e16b234294a20c285d00d

lib/paranoia.rb

@@ -265,7 +265,12 @@ module ActiveRecord
       def build_relation(klass, table, attribute, value)
         relation = super(klass, table, attribute, value)
         return relation unless klass.respond_to?(:paranoia_column)
-        relation.and(klass.arel_table[klass.paranoia_column].eq(klass.paranoia_sentinel_value))
+        arel_paranoia_scope = klass.arel_table[klass.paranoia_column].eq(klass.paranoia_sentinel_value)
+        if ActiveRecord::VERSION::STRING >= "5.0"
+          relation.where(arel_paranoia_scope)
+        else
+          relation.and(arel_paranoia_scope)
+        end
       end
     end