Cap Python2 version

zhaoqin-github · zhaoqin-github · commit d76152ee7a57 · 2021-06-07T11:04:26.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,9 +1,9 @@
 language: python
 python:
-  - 2.7
+  - 2.7.15
   - 3.5
   - 3.6
-dist: focal
+dist: bionic
 sudo: true
 env:
   global:
