Merge pull request #246 from thewatts/nw-fix-spring-config

Fix load error when using Spring w/ custom config

lib/dotenv/rails.rb

@@ -4,7 +4,7 @@
 
 # Watch all loaded env files with Spring
 begin
-  require "spring/watcher"
+  require "spring/commands"
   ActiveSupport::Notifications.subscribe(/^dotenv/) do |*args|
     event = ActiveSupport::Notifications::Event.new(*args)
     Spring.watch event.payload[:env].filename if Rails.application