binary only for cryptography (#49)

* binary only for cryptography

* fixup

Author: TomAugspurger

.travis.yml

@@ -65,7 +65,9 @@ before_install:
     - CONTAINER="pre-release";
     - BUILD_COMMIT=$BUILD_COMMIT;
     - BUILD_DEPENDS="$NP_BUILD_DEP Cython==0.28.2"
-    - TEST_DEPENDS="$NP_TEST_DEP pytest==4.3.1 pytest-xdist==1.26.1 pytest-mock moto hypothesis wheel==0.31.1"
+      # binary-only for cryptogrpahy. See https://github.com/pandas-dev/pandas/issues/26589
+      # Moto picks it up, and they don't distribute 32-bit wheels.
+    - TEST_DEPENDS="$NP_TEST_DEP pytest==3.8.2 pytest-xdist pytest-mock moto hypothesis wheel==0.31.1 cryptography --only-binary=cryptography"
     - source multibuild/common_utils.sh
     - source multibuild/travis_steps.sh
     - before_install