Update plugin POM and BOM (#9)

Author: basil

.mvn/extensions.xml

@@ -0,0 +1,7 @@
+<extensions xmlns="http://maven.apache.org/EXTENSIONS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/EXTENSIONS/1.0.0 http://maven.apache.org/xsd/core-extensions-1.0.0.xsd">
+  <extension>
+    <groupId>io.jenkins.tools.incrementals</groupId>
+    <artifactId>git-changelist-maven-extension</artifactId>
+    <version>1.3</version>
+  </extension>
+</extensions>

.mvn/maven.config

@@ -0,0 +1,2 @@
+-Pconsume-incrementals
+-Pmight-produce-incrementals

pom.xml

@@ -4,25 +4,25 @@
     <parent>
         <groupId>org.jenkins-ci.plugins</groupId>
         <artifactId>plugin</artifactId>
-        <version>3.47</version>
+        <version>4.40</version>
         <relativePath />
     </parent>
 
     <groupId>io.jenkins.plugins</groupId>
     <artifactId>gitlab-api</artifactId>
-    <version>1.0.7-SNAPSHOT</version>
+    <version>${revision}${changelist}</version>
     <packaging>hpi</packaging>
 
     <properties>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <jenkins.version>2.60.3</jenkins.version>
-        <java.level>8</java.level>
+        <revision>1.0.7</revision>
+        <changelist>-SNAPSHOT</changelist>
+        <jenkins.version>2.289.3</jenkins.version>
+        <gitHubRepo>jenkinsci/${project.artifactId}-plugin</gitHubRepo>
     </properties>
 
     <name>Gitlab API Plugin</name>
     <description>Wraps Gitlab4J API into a plugin</description>
-    <url>https://github.com/jenkinsci/gitlab-api-plugin</url>
+    <url>https://github.com/jenkinsci/${project.artifactId}-plugin</url>
 
     <issueManagement>
         <url>https://issues.jenkins-ci.org/browse/JENKINS-57445?jql=project%20%3D%20JENKINS%20AND%20component%20%3D%20gitlab-api-plugin</url>
@@ -46,23 +46,30 @@
     </developers>
 
     <scm>
-        <connection>scm:git:git://github.com/jenkinsci/${project.artifactId}-plugin.git</connection>
-        <developerConnection>scm:git:git@github.com:jenkinsci/${project.artifactId}-plugin.git</developerConnection>
-        <url>https://github.com/jenkinsci/${project.artifactId}-plugin</url>
+        <connection>scm:git:https://github.com/${gitHubRepo}.git</connection>
+        <developerConnection>scm:git:git@github.com:${gitHubRepo}.git</developerConnection>
+        <url>https://github.com/${gitHubRepo}</url>
         <tag>${scmTag}</tag>
     </scm>
 
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>io.jenkins.tools.bom</groupId>
+                <artifactId>bom-2.289.x</artifactId>
+                <version>1246.va_b_50630c1d19</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
     <dependencies>
         <dependency>
             <groupId>org.gitlab4j</groupId>
             <artifactId>gitlab4j-api</artifactId>
 	    <version>4.14.20</version>
         </dependency>
-        <dependency>
-            <groupId>javax.servlet</groupId>
-            <artifactId>javax.servlet-api</artifactId>
-            <version>4.0.1</version>
-        </dependency>
     </dependencies>
 
     <repositories>