Upgrade Maven Plugins

Closes gh-356

Author: philwebb

Diff for: pom.xml

@@ -75,17 +75,17 @@
 				<plugin>
 					<groupId>com.googlecode.maven-download-plugin</groupId>
 					<artifactId>download-maven-plugin</artifactId>
-					<version>1.6.0</version>
+					<version>1.6.8</version>
 				</plugin>
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-antrun-plugin</artifactId>
-					<version>1.8</version>
+					<version>3.1.0</version>
 				</plugin>
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-checkstyle-plugin</artifactId>
-					<version>3.1.1</version>
+					<version>3.2.1</version>
 					<dependencies>
 						<dependency>
 							<groupId>com.puppycrawl.tools</groupId>
@@ -97,22 +97,22 @@
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-clean-plugin</artifactId>
-					<version>3.1.0</version>
+					<version>3.2.0</version>
 				</plugin>
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-compiler-plugin</artifactId>
-					<version>3.8.1</version>
+					<version>3.10.1</version>
 				</plugin>
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-deploy-plugin</artifactId>
-					<version>2.8.2</version>
+					<version>3.0.0</version>
 				</plugin>
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-dependency-plugin</artifactId>
-					<version>3.1.2</version>
+					<version>3.5.0</version>
 				</plugin>
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
@@ -130,32 +130,32 @@
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-install-plugin</artifactId>
-					<version>2.5.2</version>
+					<version>3.1.0</version>
 				</plugin>
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-invoker-plugin</artifactId>
-					<version>3.2.1</version>
+					<version>3.4.0</version>
 				</plugin>
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-jar-plugin</artifactId>
-					<version>3.2.0</version>
+					<version>3.3.0</version>
 				</plugin>
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-plugin-plugin</artifactId>
-					<version>3.6.0</version>
+					<version>3.7.1</version>
 				</plugin>
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-shade-plugin</artifactId>
-					<version>3.2.4</version>
+					<version>3.4.1</version>
 				</plugin>
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-site-plugin</artifactId>
-					<version>3.9.1</version>
+					<version>3.12.1</version>
 				</plugin>
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
@@ -179,7 +179,7 @@
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-javadoc-plugin</artifactId>
-					<version>3.2.0</version>
+					<version>3.4.1</version>
 					<configuration>
 						<source>8</source>
 						<additionalOptions>-Xdoclint:none</additionalOptions>
@@ -188,22 +188,22 @@
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-resources-plugin</artifactId>
-					<version>3.2.0</version>
+					<version>3.3.0</version>
 				</plugin>
 				<plugin>
 					<groupId>org.codehaus.mojo</groupId>
 					<artifactId>versions-maven-plugin</artifactId>
-					<version>2.8.1</version>
+					<version>2.14.2</version>
 				</plugin>
 				<plugin>
 					<groupId>org.codehaus.mojo</groupId>
 					<artifactId>exec-maven-plugin</artifactId>
-					<version>3.0.0</version>
+					<version>3.1.0</version>
 				</plugin>
 				<plugin>
 					<groupId>org.codehaus.mojo</groupId>
 					<artifactId>build-helper-maven-plugin</artifactId>
-					<version>3.2.0</version>
+					<version>3.3.0</version>
 				</plugin>
 				<plugin>
 					<groupId>org.eclipse.tycho</groupId>