chore(deps-dev): bump jenkins-core from 2.179 to 2.284

Bumps [jenkins-core](https://github.com/jenkinsci/pom) from 2.179 to 2.284.
- [Release notes](https://github.com/jenkinsci/pom/releases)
- [Changelog](https://github.com/jenkinsci/pom/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jenkinsci/pom/commits)

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>co.elastic</groupId>
   <artifactId>jenkins-library</artifactId>
-  <version>1.1.202-SNAPSHOT</version>
+  <version>1.1.203-SNAPSHOT</version>
   <name>APM Pipeline Shared Library</name>
   <description>Pipeline Shared Library containing utility steps.</description>
   <url>https://github.com/elastic/apm-pipeline-library</url>
@@ -67,7 +67,7 @@
     <dependency>
       <groupId>org.jenkins-ci.main</groupId>
       <artifactId>jenkins-core</artifactId>
-      <version>2.179</version>
+      <version>2.284</version>
       <scope>test</scope>
     </dependency>
     <dependency>