re-enable deprecation errors

had to disable this to let transpec do
dynamic analysis. re-enabling now to throw
an error on any deprecation warning

Author: David Maloney

spec/spec_helper.rb

@@ -36,7 +36,7 @@
 end
 
 RSpec.configure do |config|
-  #config.raise_errors_for_deprecations!
+  config.raise_errors_for_deprecations!
 
   config.expose_dsl_globally = false