update cibuildwheel to build bin wheel for python 3.9 (#41)

xyb · web-flow · commit 01ff74429008 · 2020-12-09T20:10:04.000+08:00
* update cibuildwheel to build bin wheel for python 3.9

* make sure to use python 3
diff --git a/.travis.yml b/.travis.yml
@@ -81,7 +81,7 @@ install:
   - gcc --version
   - |
     if [ -n "${XXHASH_BUILDWHEELS:-}" ]; then
-      pip install cibuildwheel
+      pip3 install cibuildwheel==1.7.0
     fi
 
 script:
