rspec.rb in mongoid-rspec-4.0.1

- old
+ new

@@ -23,9 +23,10 @@
 require 'matchers/validations/numericality_of'
 require 'matchers/validations/presence_of'
 require 'matchers/validations/uniqueness_of'
 require 'matchers/validations/acceptance_of'
 require 'matchers/validations/custom_validation_of'
+require 'matchers/validations/absence_of'
 require 'matchers/be_mongoid_document'
 require 'matchers/be_dynamic_document'
 require 'matchers/be_stored_in'
 require 'matchers/have_field'
 require 'matchers/indexes/have_index_for'