Update travis config to suppress email notification

ra1028 · ra1028 · commit 8a352770ff38 · 2019-01-21T22:03:36.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -31,4 +31,4 @@ matrix:
         - swift test
 
 notifications:
-email: false
+  email: false
