ci: switch to using yarn cache

nhooyr · nhooyr · commit 28b80b1d749a · 2019-03-07T17:33:54.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -35,4 +35,4 @@ deploy:
   on:
     repo: codercom/code-server
     branch: master
-cache: npm
+cache: yarn
