Update test.generative

[jcharaoui]

While attempting to run the testsuite with the cheshire package on Debian, lein test fails with:

Syntax error (ClassNotFoundException) compiling at (cheshire/test/generative.clj:15:1).
clojure.data.generators

The version of test.generative on Debian is 1.0.0.

[rlbdv]

Not sure this is right, but it does allow lein test :generative to run with 1.0.0 #198 Be happy to make adjustments if it's interesting.

[rlbdv]

Oh, and I'm not very familiar with test.generative, but it looks like it may have changed its API a good bit since 0.1.4.