Bump mathjs from 7.1.0 to 7.5.1 (#50)

Bumps [mathjs](https://github.com/josdejong/mathjs) from 7.1.0 to 7.5.1.
- [Release notes](https://github.com/josdejong/mathjs/releases)
- [Changelog](https://github.com/josdejong/mathjs/blob/develop/HISTORY.md)
- [Commits](josdejong/mathjs@v7.1.0...v7.5.1)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]