Merge pull request #36 from apache/dependabot/maven/protobuf/com.google.protobuf-protobuf-java-3.16.3

Bump protobuf-java from 2.5.0 to 3.16.3 in /protobuf
diff --git a/protobuf/pom.xml b/protobuf/pom.xml
index 5ed0781..ae4bd00 100644
--- a/protobuf/pom.xml
+++ b/protobuf/pom.xml
@@ -33,7 +33,7 @@
   <properties>
     <symbolicName>${project.groupId}.protobuf</symbolicName>
     <exportedPackage>${project.groupId}</exportedPackage>
-    <protobuf.version>2.5.0</protobuf.version>
+    <protobuf.version>3.16.3</protobuf.version>
   </properties>
 
   <dependencies>