Update Gradle version to 4.8.

bf708d5c · Eric Bruneton · f99ff439 · bf708d5c · bf708d5c
Commit bf708d5c authored Jun 16, 2018 by Eric Bruneton
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
-image: gradle:4.6-jdk8-alpine
+image: gradle:4.8-jdk8-alpine

 variables:
  # Set the location of the dependency cache to a local directory, so that it

--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.8-bin.zip