Forward compatibility with jenkinsci/jenkins#8503 (#246)

Use plugin BOM 2133.v2e6c00fe4d61

[JENKINS-71331] Show plugin docs on plugins site (#210)

Recent changes to pom.xml may be the root cause of the missing
documentation on https://plugins.jenkins.io/testng-plugin/

Prepare for 730.x

Require Java 11

Require Jenkins 2.361.4 or newer.

https://www.jenkins.io/doc/developer/plugin-development/choosing-jenkins-baseline/
offers Jenkins 2.361.4 as one of the recommended versions.

Java 11 or newer is required for Jenkins 2.361.4 and for the most recent
releases of the parent pom.

Merge pull request #155 from MarkEWaite/add-pipeline-symbol

Add `testNG` symbol for Pipeline syntax clarity

[SECURITY-2788]

Merge pull request #67 from MarkEWaite/fix-job-summary-graph

[JENKINS-67098] Render summary graph with GET or POST

Merge pull request #65 from jenkinsci/dependabot/github_actions/actio…

…ns/checkout-2.4.0

Bump actions/checkout from 2.3.4 to 2.4.0

[maven-release-plugin] copy for tag testng-plugin-1.15