Update .travis.yml

Author: daggerok

.travis.yml

@@ -1,14 +1,26 @@
 env:
-  - TERM=dumb
-sudo: false
+- TERM=dumb
+
 language: groovy
-jdk:
-- oraclejdk8
-- openjdk8
+jdk: oraclejdk8
+
+before_cache:
+- bash -c 'for lockFile in $(find ~/.gradle -name "*.lock"); do sudo rm -rf $lockFile ; done'
+
 cache:
   directories:
-  - "$HOME/.gradle/caches/"
+  - $HOME/.m2
+  - $HOME/.gradle
+  - $HOME/.docker
+
+addons:
+  apt:
+    update: true
+    packages:
+    - bash
+
 install: true
 script: bash gradlew clean build
-after_success: bash ./gradlew jacocoTestReport coveralls
-after_failure: bash ./gradlew clean check --debug
+
+after_success: bash gradlew jacocoTestReport coveralls
+after_failure: bash gradlew clean check --debug