Update grpc-java and other dependency versions

- grpc-java 1.25.0
- netty 4.1.42.Final
- netty-tcnative 2.0.26.Final
- protobuf 3.10.0
- slf4j 1.7.29

- maven-source-plugin 3.2.0

Author: njhill

pom.xml

@@ -55,12 +55,12 @@
    </distributionManagement>
 
    <properties>
-      <grpc-version>1.24.1</grpc-version>
-      <netty-version>4.1.38.Final</netty-version>
-      <netty-tcnative-version>2.0.25.Final</netty-tcnative-version>
-      <protoc-version>3.9.0</protoc-version>
+      <grpc-version>1.25.0</grpc-version>
+      <netty-version>4.1.42.Final</netty-version>
+      <netty-tcnative-version>2.0.26.Final</netty-tcnative-version>
+      <protoc-version>3.10.0</protoc-version>
       <gson-version>2.8.5</gson-version>
-      <slf4j-version>1.7.28</slf4j-version>
+      <slf4j-version>1.7.29</slf4j-version>
       <junit-version>4.12</junit-version>
       <guava-version>28.1-jre</guava-version>
       <annotation-version>1.3.2</annotation-version>
@@ -243,7 +243,7 @@
                <plugin>
                   <groupId>org.apache.maven.plugins</groupId>
                   <artifactId>maven-source-plugin</artifactId>
-                  <version>3.1.0</version>
+                  <version>3.2.0</version>
                   <executions>
                      <execution>
                         <id>attach-sources</id>