Force go stable to workaround travis-ci/gimme#157

FiloSottile · FiloSottile · commit 44af1b655699 · 2018-08-13T00:33:52.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,6 @@
 language: go
 sudo: false
-go: "1.x"
+go: stable
 install: "# skip"
 
 script:
