Bump protobuf-java from 3.18.2 to 3.19.6 (#56)

pom.xml

@@ -72,7 +72,7 @@ See the Mulan PSL v2 for more details.
     <commons-lang.version>3.12.0</commons-lang.version>
     <commons-codec.version>1.15</commons-codec.version>
     <netty.version>4.1.68.Final</netty.version>
-    <protobuf.version>3.18.2</protobuf.version>
+    <protobuf.version>3.19.6</protobuf.version>
     <lz4.version>1.8.0</lz4.version>
     <slf4j.version>1.7.32</slf4j.version>
     <logback.version>1.2.10</logback.version>