Auto-updated tests with transpec.  All tests still pass.

I'm trying to add some functionality that I'd like to **date_time_precision**, and I was having a problem that the tests use depreciated syntax, and some of them are depreciated enough that they fail.

On the [rspec site](https://www.relishapp.com/rspec/rspec-expectations/docs/syntax-configuration), at , they recommend using [Transpec](http://yujinakayama.me/transpec/) to update the syntax. 

Running it appears to have updated the tests to the new syntax, and solves my problems with the tests.

Dunno if this is something you're interested in, but figured I'd send it your way and see if it helps.

The library is super-helpful, by the way.  Thank you.