Bump crate@master to get blob redirect fix

Upgrade tests are currently failing.
See crate/crate-python#793

Author: mfussenegger

setup.py

@@ -29,7 +29,7 @@ def read(filename):
     package_dir={'': 'src'},
     packages=["crate", "crate.qa"],
     install_requires=[
-        'crate>=1.0.0.dev2',
+        'crate @ git+https://github.com/crate/crate-python.git@master',
         'cr8>=0.29.1',
         'Cython',
         'asyncpg>=0.21',