Enable local build cache on Travis

Signed-off-by: Paul Merlin <paul@gradle.com>

Author: eskatos

.travis.yml

@@ -9,7 +9,7 @@ matrix:
       sudo: required
       jdk: openjdk11
 
-script: ./gradlew check --info --stacktrace --console=plain --max-workers=1 --no-daemon -Dkotlin.colors.enabled=false
+script: ./gradlew check --info --stacktrace --console=plain --max-workers=1 --no-daemon --build-cache -Dkotlin.colors.enabled=false
 
 before_cache:
   - rm -f  $HOME/.gradle/caches/modules-2/modules-2.lock