[Java] Upgrade to Gradle 5.2.1 and Shadow 5.0.0.

Author: mjpt777

build.gradle

@@ -21,7 +21,7 @@ buildscript {
 
 plugins {
     id 'java'
-    id 'com.github.johnrengelman.shadow' version '4.0.4' apply false
+    id 'com.github.johnrengelman.shadow' version '5.0.0' apply false
     id "io.freefair.javadoc-links" version "3.1.4"
 }
 
@@ -119,7 +119,7 @@ subprojects {
     apply plugin: 'checkstyle'
     apply plugin: 'eclipse'
     apply plugin: 'io.freefair.javadoc-links'
-    
+
     group = sbeGroup
     version = sbeVersion
 
@@ -762,6 +762,6 @@ task uploadToMavenCentral {
 }
 
 wrapper {
-    gradleVersion = '4.10.3'
+    gradleVersion = '5.2.1'
     distributionType = 'ALL'
 }

gradle/wrapper/gradle-wrapper.jar

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradle/wrapper/gradle-wrapper.properties

@@ -28,7 +28,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS=""
+DEFAULT_JVM_OPTS='"-Xmx64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"

gradlew

@@ -14,7 +14,7 @@ set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS=
+set DEFAULT_JVM_OPTS="-Xmx64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome

gradlew.bat

@@ -1,4 +1,3 @@
 include 'sbe-tool', 'sbe-samples', 'sbe-benchmarks', 'sbe-all'
 rootProject.name = 'sbe'
-enableFeaturePreview('IMPROVED_POM_SUPPORT')