Update dependencies.

Author: donbeave

build.gradle

@@ -12,16 +12,16 @@ buildscript {
         projectVersion = '2.12.0-SNAPSHOT'
 
         // https://github.com/grpc/grpc-java/releases
-        grpcVersion = '1.35.0'
+        grpcVersion = '1.37.0'
 
         // https://github.com/google/guava/releases
-        guavaVersion = '30.1-jre'
+        guavaVersion = '30.1.1-jre'
         // https://github.com/protocolbuffers/protobuf/releases
-        protobufVersion = '3.14.0'
+        protobufVersion = '3.15.8'
         protobufGradlePluginVersion = '0.8.12'
 
         // https://github.com/spring-projects/spring-boot/releases
-        springBootVersion = '2.4.3'
+        springBootVersion = '2.4.4'
         // https://github.com/spring-cloud/spring-cloud-release/releases
         springCloudVersion = '2020.0.1'
         // https://github.com/alibaba/spring-cloud-alibaba/releases
@@ -41,7 +41,7 @@ plugins {
     id 'org.springframework.boot' version "${springBootVersion}" apply false
     id 'io.spring.dependency-management' version '1.0.11.RELEASE'
     id 'net.nemerosa.versioning' version '2.14.0'
-    id 'com.google.protobuf' version '0.8.14'
+    id 'com.google.protobuf' version '0.8.15'
     id 'io.franzbecker.gradle-lombok' version '4.0.0' apply false
     id 'com.github.ben-manes.versions' version '0.36.0' // gradle dependencyUpdates
     id 'com.diffplug.spotless' version '5.11.0'
@@ -60,7 +60,7 @@ if (hasProperty('buildScan')) {
 wrapper {
     // Update using:
     // ./gradlew wrapper --gradle-version=6.5 --distribution-type=bin
-    gradleVersion = '6.8.3'
+    gradleVersion = '7.0'
 }
 
 def buildTimeAndDate = OffsetDateTime.now()
@@ -206,6 +206,9 @@ allprojects { project ->
 
     if (project.name == 'grpc-common-spring-boot' || project.name == 'grpc-client-spring-boot-autoconfigure' || project.name == 'grpc-server-spring-boot-autoconfigure') {
         // Properly generate javadocs for the important projects
+        lombok {
+            version = "1.18.20"
+        }
 
         task delombok(type: DelombokTask, dependsOn: compileJava) {
             ext.outputDir = file("$buildDir/delombok")