Simplify sbt cache in Travis

ashawley · ashawley · commit c92721c0bbd6 · 2019-04-19T11:13:44.000-04:00
https://www.scala-sbt.org/1.0/docs/Travis-CI-with-sbt.html
diff --git a/.travis.yml b/.travis.yml
@@ -38,5 +38,4 @@ before_cache:
 cache:
   directories:
   - $HOME/.ivy2/cache
-  - $HOME/.sbt/boot
-  - $HOME/.sbt/launchers
+  - $HOME/.sbt
