Update simple form

Author: jurre

Gemfile

@@ -17,7 +17,7 @@ gem "rack-timeout"
 gem "rails", "~> 4.2.11"
 gem "recipient_interceptor"
 gem "sass-rails", "~> 5.0.1"
-gem "simple_form", "~> 4.0.0"
+gem "simple_form"
 gem "title"
 gem "uglifier"
 gem "unicorn"

Gemfile.lock

@@ -952,7 +952,7 @@ DEPENDENCIES
   sass-rails (~> 5.0.1)
   select2-rails
   shoulda-matchers (~> 2.7.0)
-  simple_form (~> 4.0.0)
+  simple_form
   simplecov
   spring
   spring-commands-rspec