add timeout option

[blakeroberts-wk]

Motivation

Changes

Release Notes

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QA Checklist

• Tests were updated and provide good coverage of the changeset and other affected code
• Manual testing was performed if needed
  • Steps from PR author:
  • Anything falling under manual testing criteria outlined in CONTRIBUTING.md

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[blakeroberts-wk]

QA +1 manual testing, I was able to set a timeout in dart and have it applied to the this._timeout of a SockJS

[blakeroberts-wk]

@Workiva/release-management-p

[rmconsole-wf]

+1 from RM