Update .travis.yml

chenyh1990 · web-flow · commit fbbd9b1b45ee · 2020-06-01T20:15:32.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -5,7 +5,7 @@ matrix:
     - rust: stable
     - rust: beta
     - rust: nightly
-    - rust: 1.28.0
+    - rust: 1.31.0
     - rust: nightly
       env: CLIPPY
       script: |
