Depenedencies update

Build time dependencies:
* Gradle: 5.3.1 -> 5.4.1
* kotlin: 1.3.21 -> 1.3.31
* checkstyle:8.19 -> checkstyle:8.20
* spotbugs-gradle-plugin:1.7.1 -> 2.0.0
* gradle-lombok:2.1 -> 3.0.0
* lombok:1.18.4 -> 1.18.8

Library dependencies:
* okhttp3: 3.14.0 -> 3.14.2
* spring-boot: 2.1.3.RELEASE -> 2.1.5.RELEASE

Author: imasahiro

build.gradle

@@ -17,7 +17,7 @@
 // ./gradlew clean && ./gradlew uploadArchives -Prelease
 
 buildscript {
-    ext.kotlin_version = '1.3.21'
+    ext.kotlin_version = '1.3.31'
 
     repositories {
         mavenCentral()
@@ -26,10 +26,10 @@ buildscript {
     }
     dependencies {
         classpath 'com.github.ben-manes:gradle-versions-plugin:0.21.0'
-        classpath 'com.puppycrawl.tools:checkstyle:8.19'
-        classpath 'gradle.plugin.com.github.spotbugs:spotbugs-gradle-plugin:1.7.1'
+        classpath 'com.puppycrawl.tools:checkstyle:8.20'
+        classpath 'gradle.plugin.com.github.spotbugs:spotbugs-gradle-plugin:2.0.0'
         classpath 'gradle.plugin.com.gorylenko.gradle-git-properties:gradle-git-properties:2.0.0'
-        classpath 'io.franzbecker:gradle-lombok:2.1'
+        classpath 'io.franzbecker:gradle-lombok:3.0.0'
         classpath 'io.spring.gradle:dependency-management-plugin:1.0.7.RELEASE'
         classpath 'io.spring.gradle:propdeps-plugin:0.0.10.RELEASE'
         classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.1.3.RELEASE'
@@ -89,14 +89,14 @@ subprojects {
     version = rootProject.version
 
     ext['guava.version'] = '27.1-jre'
-    ext['okhttp3.version'] = '3.14.0'
+    ext['okhttp3.version'] = '3.14.2'
     ext['retrofit.version'] = '2.5.0'
 
     dependencyManagement {
         if (project.name != 'test-boot1-compatibility') {
             imports {
                 mavenBom 'io.spring.platform:platform-bom:Cairo-RELEASE'
-                mavenBom 'org.springframework.boot:spring-boot-dependencies:2.1.3.RELEASE'
+                mavenBom 'org.springframework.boot:spring-boot-dependencies:2.1.5.RELEASE'
             }
         }
 
@@ -109,7 +109,7 @@ subprojects {
                 entry 'retrofit'
             }
             dependency 'org.assertj:assertj-core:3.12.1'
-            dependency 'org.projectlombok:lombok:1.18.6'
+            dependency 'org.projectlombok:lombok:1.18.8'
         }
     }
 
@@ -162,7 +162,7 @@ subprojects {
     }
 
     lombok {
-        version = '1.18.4'
+        version = '1.18.8'
     }
 
     if (!project.name.startsWith('sample-') && !project.name.startsWith('test-')) {
@@ -200,7 +200,7 @@ subprojects {
 
     checkstyle {
         configProperties = [projectDir: rootProject.projectDir]
-        toolVersion = '8.19'
+        toolVersion = '8.20'
     }
 
     spotbugs {

gradle/wrapper/gradle-wrapper.jar

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.3.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,21 @@
 #!/usr/bin/env sh
 
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 ##############################################################################
 ##
 ##  Gradle start up script for UN*X
@@ -28,7 +44,7 @@ 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='"-Xmx64m"'
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"

gradlew

@@ -1,3 +1,19 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      http://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
 @if "%DEBUG%" == "" @echo off
 @rem ##########################################################################
 @rem
@@ -14,7 +30,7 @@ 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="-Xmx64m"
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome