Pin pandas<0.21 to unbreak the build.

anntzer · anntzer · commit 73b3d1820128 · 2017-10-29T12:00:11.000-07:00
Just a temporary measure until the actual issue with pandas 0.21 gets
fixed.
diff --git a/.travis.yml b/.travis.yml
@@ -57,7 +57,7 @@ env:
 matrix:
   include:
     - python: 2.7
-      env: MOCK=mock NUMPY=numpy==1.7.1 PANDAS=pandas NOSE=nose
+      env: MOCK=mock NUMPY=numpy==1.7.1 PANDAS='pandas<0.21.0' NOSE=nose
     - python: 3.4
       env: PYTHON_ARGS=-OO
     - python: 3.6
