update grpc to version 1.24

update protoc to version 3.9.1

Author: lt-schmidt-jr

contrib/pom.xml

@@ -59,8 +59,8 @@
         <mavenBaseUrl>https://oss.sonatype.org/content/repositories</mavenBaseUrl>
 
         <!-- Dependency Versions -->
-        <grpc.version>1.12.0</grpc.version>
-        <protoc.version>3.5.1</protoc.version> <!-- Same version as grpc-proto -->
+        <grpc.version>1.24.0</grpc.version>
+        <protoc.version>3.9.1</protoc.version> <!-- Same version as grpc-proto -->
         <slf4j.version>1.7.21</slf4j.version>
         <gson.version>2.7</gson.version> <!-- Same version as grpc-proto -->
         <mustache-java.version>0.9.4</mustache-java.version>

demos/pom.xml

@@ -59,8 +59,8 @@
         <contrib.version>0.8.1</contrib.version>
         <jprotoc.version>0.8.1</jprotoc.version>
 
-        <grpc.version>1.12.0</grpc.version>
-        <protoc.version>3.5.1</protoc.version> <!-- Same version as grpc-proto -->
+        <grpc.version>1.24.0</grpc.version>
+        <protoc.version>3.9.1</protoc.version> <!-- Same version as grpc-proto -->
         <slf4j.version>1.7.21</slf4j.version>
         <gson.version>2.7</gson.version> <!-- Same version as grpc-proto -->
         <mustache-java.version>0.9.4</mustache-java.version>

jprotoc/jprotoc/pom.xml

@@ -31,6 +31,12 @@
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
         </dependency>
+        <dependency>
+            <groupId>com.google.protobuf</groupId>
+            <artifactId>protobuf-java-util</artifactId>
+            <version>${protoc.version}</version>
+        </dependency>
+
         <!-- Test dependencies -->
         <dependency>
             <groupId>junit</groupId>

jprotoc/pom.xml

@@ -60,8 +60,8 @@
         <!-- Dependency Versions -->
         <contrib.version>0.8.1</contrib.version>
 
-        <grpc.version>1.12.0</grpc.version>
-        <protoc.version>3.5.1</protoc.version> <!-- Same version as grpc-proto -->
+        <grpc.version>1.24.0</grpc.version>
+        <protoc.version>3.9.1</protoc.version> <!-- Same version as grpc-proto -->
         <slf4j.version>1.7.21</slf4j.version>
         <gson.version>2.7</gson.version> <!-- Same version as grpc-proto -->
         <mustache-java.version>0.9.4</mustache-java.version>