Bump the maven-build-plugins group across 1 directory with 4 updates (#34)

Author: dependabot[bot]

pom.xml

@@ -82,7 +82,7 @@
             </plugin>
             <plugin>
                 <artifactId>maven-source-plugin</artifactId>
-                <version>3.3.0</version>
+                <version>3.3.1</version>
                 <executions>
                     <execution>
                         <id>attach-sources</id>
@@ -99,7 +99,7 @@
 			</plugin>
             <plugin>
                 <artifactId>maven-javadoc-plugin</artifactId>
-                <version>3.6.3</version>
+                <version>3.7.0</version>
                 <executions>
                     <execution>
                         <id>attach-javadocs</id>
@@ -148,7 +148,7 @@
 				<plugins>
 					<plugin>
 						<artifactId>maven-gpg-plugin</artifactId>
-						<version>3.2.2</version>
+						<version>3.2.4</version>
 						<executions>
 							<execution>
 								<id>sign-artifacts</id>
@@ -183,7 +183,7 @@
 					<plugin>
 						<groupId>org.sonatype.plugins</groupId>
 						<artifactId>nexus-staging-maven-plugin</artifactId>
-						<version>1.6.13</version>
+						<version>1.7.0</version>
 						<extensions>true</extensions>
 						<configuration>
 							<serverId>ossrh</serverId>