doc: add 13 and 12 to previous versions
Remove Node.js 6 and add Node.js 12 and Node.js 13 to the previous versions of this document section
Checklist
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documentation is changed or added -
commit message follows commit guidelines
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Remove Node.js 6 and add Node.js 12 and Node.js 13 to the previous versions of this document section