Add deprecation notice to NEWS.md
Add deprecation notice to NEWS.md

Last version that supports Rails 4.0 and 4.1 and Ruby 2.0 and 2.1.
thoughtbot/shoulda-matchers,biow0lf/shoulda-matchers,thoughtbot/shoulda-matchers,reacuna/shoulda-matchers,thoughtbot/shoulda-matchers,guialbuk/shoulda-matchers,guialbuk/shoulda-matchers,reacuna/shoulda-matchers,guialbuk/shoulda-matchers,reacuna/shoulda-matchers,thoughtbot/shoulda-matchers,biow0lf/shoulda-matchers,biow0lf/shoulda-matchers,guialbuk/shoulda-matchers,reacuna/shoulda-matchers,biow0lf/shoulda-matchers