Improve Travis CI build Performance (#42)

chenzhang22 · web-flow · commit f7ecf34ded9f · 2021-08-17T13:00:36.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,3 +3,7 @@ language: java
 jdk:
   - openjdk8
   - openjdk11
+
+cache:
+  directories:
+  - $HOME/.m2
