Cache maven artifact directory to enable faster builds.

Arvind Nadendla · Arvind Nadendla · commit 4f6867199ddd · 2018-02-22T20:05:32.000-08:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,3 +1,9 @@
+# Cache maven cache directory so external artifacts dont need to be
+# re-downloaded.
+cache:
+  directories:
+  - $HOME/.m2
+
 language: java
 
 jdk:
