Enable caching for CI

nightowlengineer · nightowlengineer · commit b3d075eec875 · 2019-12-20T23:00:14.000Z
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,7 @@
 language: java
 jdk:
   - openjdk8
+cache:
+  directories:
+    - $HOME/.m2
 install: mvn install -Dgpg.skip
