Merge pull request #179 from carbonin/sort_tables_before_removing_limits

Remove the limits from the tables in sorted order

db/migrate/20171109225052_remove_string_column_limits.rb

@@ -1,6 +1,6 @@
 class RemoveStringColumnLimits < ActiveRecord::Migration[5.0]
   def up
-    connection.tables.each do |t|
+    connection.tables.sort.each do |t|
       connection.columns(t).each do |col|
         next unless col.type == :string && !col.limit.nil?
         change_column t, col.name, :string, :limit => nil