Upgrade underscore.js
What does this MR do?
Upgrades underscore.js to 1.9 (http://underscorejs.org/#changelog). Most important part: Three years of performance improvements.
Why was this MR needed?
So underscore is up to date.
Does this MR meet the acceptance criteria?
- Review
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Has been reviewed by Frontend
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Conform by the merge request performance guides -
Conform by the style guides -
Squashed related commits together -
Internationalization required/considered -
End-to-end tests pass ( package-and-qa
manual pipeline job)
What are the relevant issue numbers?
Edited by Filipa Lacerda