cleanups + version upgrades

Author: Alexander Furer

build.gradle

@@ -7,9 +7,7 @@ buildscript {
 
     }
     dependencies {
-        classpath "com.jfrog.bintray.gradle:gradle-bintray-plugin:1.5"
-        classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.11'
-        classpath "org.jfrog.buildinfo:build-info-extractor-gradle:4.0.0"
+        classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.16'
         classpath "io.codearte.gradle.nexus:gradle-nexus-staging-plugin:0.21.1"
         classpath "de.marcphilipp.gradle:nexus-publish-plugin:0.4.0"
     }

grpc-spring-boot-starter-demo/build.gradle

@@ -112,7 +112,7 @@ sourceSets {
 
 protobuf {
     protoc {
-        artifact = 'com.google.protobuf:protoc:3.5.1'
+        artifact = 'com.google.protobuf:protoc:3.17.1'
     }
     plugins {
         grpc {