Central Portal Migration (#161)

*Issue #, if available:* None

*Description of changes:* Migrating off of Nexus 2 to Central Portal for
releases https://central.sonatype.org/publish/publish-portal-guide/


By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 license.

Author: crus-umich

pom.xml

@@ -90,7 +90,7 @@
                     <execution>
                         <id>attach-sources</id>
                         <goals>
-                            <goal>jar</goal>
+                            <goal>jar-no-fork</goal>
                         </goals>
                     </execution>
                 </executions>
@@ -212,14 +212,12 @@
                         </executions>
                     </plugin>
                     <plugin>
-                        <groupId>org.sonatype.plugins</groupId>
-                        <artifactId>nexus-staging-maven-plugin</artifactId>
-                        <version>1.6.13</version>
+                        <groupId>org.sonatype.central</groupId>
+                        <artifactId>central-publishing-maven-plugin</artifactId>
+                        <version>0.7.0</version>
                         <extensions>true</extensions>
                         <configuration>
-                            <serverId>sonatype-nexus-staging</serverId>
-                            <nexusUrl>https://aws.oss.sonatype.org</nexusUrl>
-                            <autoReleaseAfterClose>true</autoReleaseAfterClose>
+                            <publishingServerId>central</publishingServerId>
                         </configuration>
                     </plugin>
                 </plugins>