maven: Fully automated versioning

See: https://www.jenkins.io/doc/developer/publishing/releasing-cd/

Author: scurvydoggo

.mvn/maven.config

@@ -1,2 +1,3 @@
 -Pconsume-incrementals
 -Pmight-produce-incrementals
+-Pchangelist.format=%d.v%s

pom.xml

@@ -9,15 +9,14 @@
     </parent>
 
     <properties>
-        <revision>0.40</revision>
-        <changelist>-SNAPSHOT</changelist>
+        <changelist>999999-SNAPSHOT</changelist>
         <jenkins.version>2.361.4</jenkins.version>
         <gitHubRepo>jenkinsci/${project.artifactId}-plugin</gitHubRepo>
     </properties>
 
     <groupId>org.jenkins-ci.plugins</groupId>
     <artifactId>github-oauth</artifactId>
-    <version>${revision}${changelist}</version>
+    <version>${changelist}</version>
     <name>GitHub Authentication plugin</name>
     <description>A Jenkins authentication plugin that delegates to GitHub.  We also implement an Authorization Strategy that uses the acquired OAuth token to interact with the GitHub API to determine a user's level of access to Jenkins.</description>
     <packaging>hpi</packaging>