build: update dependency gradle to v6 (#618)

Author: renovate[bot]

build.gradle

@@ -1,6 +1,5 @@
 plugins {
   id 'com.adarshr.test-logger' version '2.0.0'
-  id 'com.gradle.build-scan' version '3.1.1'
   id 'com.palantir.docker' version '0.22.1'
   id 'com.palantir.git-version' version '0.12.2'
   id 'org.inferred.processors' version '3.1.0'

gradle/wrapper/gradle-wrapper.properties

@@ -2,5 +2,5 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-bin.zip
-distributionSha256Sum=1f3067073041bc44554d0efe5d402a33bc3d3c93cc39ab684f308586d732a80d
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.0.1-bin.zip
+distributionSha256Sum=d364b7098b9f2e58579a3603dc0a12a1991353ac58ed339316e6762b21efba44

settings.gradle

@@ -1,3 +1,9 @@
+plugins {
+  id 'com.gradle.enterprise' version '3.1'
+}
+
+rootProject.name = 'sparkles'
+
 include ':apps:javalin:entity'
 include ':apps:javalin:replica'
 include ':apps:javalin:replication'
@@ -34,5 +40,3 @@ include ':support:spark:moshi'
 include ':support:spark:spring-data'
 include ':support:spark:testing'
 include ':support:spark:xsrf'
-
-rootProject.name = 'sparkles'