Use Gradle with sources

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,6 @@
+#Sun Jun 07 15:33:20 EDT 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-all.zip