Enable automatic release on merge to master (#400)

* Enable automatic release on merge to master

.github/workflows/cd.yaml

@@ -0,0 +1,15 @@
+# Note: additional setup is required, see https://www.jenkins.io/redirect/continuous-delivery-of-plugins
+
+name: cd
+on:
+  workflow_dispatch:
+  check_run:
+    types:
+      - completed
+
+jobs:
+  maven-cd:
+    uses: jenkins-infra/github-reusable-workflows/.github/workflows/maven-cd.yml@v1
+    secrets:
+      MAVEN_USERNAME: ${{ secrets.MAVEN_USERNAME }}
+      MAVEN_TOKEN: ${{ secrets.MAVEN_TOKEN }}

.mvn/maven.config

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

pom.xml

@@ -11,7 +11,7 @@
 
   <groupId>org.6wind.jenkins</groupId>
   <artifactId>lockable-resources</artifactId>
-  <version>${revision}${changelist}</version>
+  <version>${changelist}</version>
   <packaging>hpi</packaging>
 
   <name>Lockable Resources plugin</name>
@@ -51,12 +51,11 @@
     <connection>scm:git:https://github.com/${gitHubRepo}.git</connection>
     <developerConnection>scm:git:[email protected]:${gitHubRepo}.git</developerConnection>
     <url>https://github.com/${gitHubRepo}</url>
-    <tag>lockable-resources-2.19</tag>
+    <tag>${scmTag}</tag>
   </scm>
 
   <properties>
-    <revision>2.20</revision>
-    <changelist>-SNAPSHOT</changelist>
+    <changelist>999999-SNAPSHOT</changelist>
     <jenkins.version>2.361.1</jenkins.version>
     <gitHubRepo>jenkinsci/${project.artifactId}-plugin</gitHubRepo>
     <spotbugs.effort>Max</spotbugs.effort>