TST: upgrade installed version of wheel on travis

tacaswell · tacaswell · commit 939fa6f93f17 · 2015-12-24T12:22:28.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -68,6 +68,7 @@ install:
   # setuptools
   - |
     pip install --upgrade pip
+    pip install --upgrade wheel
     pip install --upgrade setuptools
   # Install only from travis wheelhouse
   - if [ -z "$PRE" ]; then
