Use detached plugin

pom.xml

@@ -23,16 +23,16 @@
   <properties>
     <changelist>999999-SNAPSHOT</changelist>
     <java.level>8</java.level>
-    <jenkins.version>2.289.1</jenkins.version>
+    <jenkins.version>2.329-rc31971.64a_ea_b_b_c2945</jenkins.version> <!-- TODO https://github.com/jenkinsci/jenkins/pull/6165 -->
     <gitHubRepo>jenkinsci/${project.artifactId}-plugin</gitHubRepo>
   </properties>
 
   <dependencyManagement>
     <dependencies>
       <dependency>
         <groupId>io.jenkins.tools.bom</groupId>
-        <artifactId>bom-2.289.x</artifactId>
-        <version>1075.v14bef33e5d7b</version>
+        <artifactId>bom-weekly</artifactId>
+        <version>1090.v0a_33df40457a_</version>
         <scope>import</scope>
         <type>pom</type>
       </dependency>
@@ -53,10 +53,6 @@
           <groupId>org.hamcrest</groupId>
           <artifactId>hamcrest-core</artifactId>
         </exclusion>
-        <exclusion> <!-- TODO pending https://github.com/jenkinsci/plugin-util-api-plugin/releases/tag/v2.9.0 in bom -->
-          <groupId>javax.annotation</groupId>
-          <artifactId>javax.annotation-api</artifactId>
-        </exclusion>
       </exclusions>
     </dependency>
     <dependency>

src/test/java/hudson/tasks/MailerTest.java

@@ -62,6 +62,7 @@
 import jenkins.model.JenkinsLocationConfiguration;
 
 import java.io.IOException;
+import java.io.UncheckedIOException;
 import java.lang.reflect.InvocationTargetException;
 import java.util.Collection;
 import java.util.Optional;
@@ -297,7 +298,11 @@ public CleanJenkinsLocationConfiguration() {
 
         @Override
         public synchronized void load() {
-            getConfigFile().delete();
+            try {
+                getConfigFile().delete();
+            } catch (IOException e) {
+                throw new UncheckedIOException(e);
+            }
             super.load();
         }
     };