Upgrade build plugin versions.

Closes gh-913

pom.xml

@@ -533,7 +533,7 @@
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-compiler-plugin</artifactId>
-					<version>3.12.1</version>
+					<version>3.14.0</version>
 				</plugin>
 
 				<plugin>
@@ -545,7 +545,7 @@
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-jar-plugin</artifactId>
-					<version>3.3.0</version>
+					<version>3.4.2</version>
 					<configuration>
 						<archive>
 							<manifestEntries>
@@ -563,31 +563,31 @@
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-enforcer-plugin</artifactId>
-					<version>3.4.1</version>
+					<version>3.5.0</version>
 				</plugin>
 
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-surefire-plugin</artifactId>
-					<version>3.2.5</version>
+					<version>3.5.3</version>
 				</plugin>
 
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-failsafe-plugin</artifactId>
-					<version>3.2.5</version>
+					<version>3.5.3</version>
 				</plugin>
 
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-source-plugin</artifactId>
-					<version>3.3.0</version>
+					<version>3.3.1</version>
 				</plugin>
 
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-javadoc-plugin</artifactId>
-					<version>3.6.3</version>
+					<version>3.11.2</version>
 					<configuration>
 						<locale>en_US</locale>
 						<breakiterator>true</breakiterator>
@@ -625,25 +625,25 @@
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-release-plugin</artifactId>
-					<version>3.0.1</version>
-				</plugin>
-
-				<plugin>
-					<groupId>org.apache.maven.plugins</groupId>
-					<artifactId>maven-deploy-plugin</artifactId>
 					<version>3.1.1</version>
 				</plugin>
 
+				<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-deploy-plugin</artifactId>
+					<version>3.1.4</version>
+				</plugin>
+
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-dependency-plugin</artifactId>
-					<version>3.6.1</version>
+					<version>3.8.1</version>
 				</plugin>
 
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-gpg-plugin</artifactId>
-					<version>3.1.0</version>
+					<version>3.2.7</version>
 				</plugin>
 
 				<plugin>
@@ -661,19 +661,19 @@
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-assembly-plugin</artifactId>
-					<version>3.6.0</version>
+					<version>3.7.1</version>
 				</plugin>
 
 				<plugin>
 					<groupId>org.codehaus.mojo</groupId>
 					<artifactId>build-helper-maven-plugin</artifactId>
-					<version>3.5.0</version>
+					<version>3.6.0</version>
 				</plugin>
 
 				<plugin>
 					<groupId>org.codehaus.mojo</groupId>
 					<artifactId>flatten-maven-plugin</artifactId>
-					<version>1.5.0</version>
+					<version>1.7.0</version>
 				</plugin>
 
 			</plugins>
@@ -949,7 +949,7 @@
 						<plugin>
 							<groupId>org.jfrog.buildinfo</groupId>
 							<artifactId>artifactory-maven-plugin</artifactId>
-							<version>3.6.1</version>
+							<version>3.6.2</version>
 							<executions>
 								<execution>
 									<id>build-info</id>