Bump jspdf from 1.5.3 to 2.3.1

Bumps [jspdf](https://github.com/MrRio/jsPDF) from 1.5.3 to 2.3.1.
- [Release notes](https://github.com/MrRio/jsPDF/releases)
- [Changelog](https://github.com/MrRio/jsPDF/blob/master/RELEASE.md)
- [Commits](parallax/jsPDF@v1.5.3...v2.3.1)

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Author: dependabot[bot]