Fix Markdown special characters not being escaped in web help

CHANGELOG.md

@@ -4,7 +4,9 @@ All notable changes to the Imperative package will be documented in this file.
 
 ## Recent Changes
 
-- Fix web help examples description typo at line 440 in `packages/cmd/src/CommandPreparer.ts`. [#612](https://github.com/zowe/imperative/issues/612)
+- BugFix: Fixed web help examples description typo at line 440 in `packages/cmd/src/CommandPreparer.ts`. [#612](https://github.com/zowe/imperative/issues/612)
+- BugFix: Fixed Markdown special characters not being escaped in web help for descriptions of positional options and examples. [#620](https://github.com/zowe/imperative/issues/620)
+- BugFix: Fixed subgroups not being displayed under their own heading in web help. [#323](https://github.com/zowe/imperative/issues/323)
 
 ## `4.13.1`
 

Jenkinsfile

@@ -54,7 +54,7 @@ node('zowe-jenkins-agent-dind') {
     ]
 
     // Initialize the pipeline library, should create 5 steps
-    pipeline.setup(nodeJsVersion: 'v10.23.2')
+    pipeline.setup(nodeJsVersion: 'v12.22.1', npmVersion: '^7')
 
     // Create a custom lint stage that runs immediately after the setup.
     pipeline.createStage(