Update travis, because why not.

fluffle · fluffle · commit a32ccd59312d · 2020-03-17T16:53:26.000Z
diff --git a/.travis.yml b/.travis.yml
@@ -2,9 +2,8 @@
 language: go
 
 go:
-  - 1.11
-  - 1.10.4
-  - 1.9.7
+  - 1.14
+  - 1.13.8
 
 sudo : false
 
