Dependencies: Use crate>=1.0.0.dev2 for validation purposes

Author: amotl

setup.py

@@ -30,7 +30,7 @@ def read(filename):
     packages=['crate.qa'],
     namespace_packages=['crate'],
     install_requires=[
-        'crate',
+        'crate>=1.0.0.dev2',
         'cr8>=0.25.0',
         'Cython',
         'asyncpg>=0.21',