Bump mathjs from 4.2.2 to 5.5.0

[dependabot-preview]

Bumps mathjs from 4.2.2 to 5.5.0.

Changelog

Sourced from mathjs's changelog.

2019-02-20, version 5.5.0

• Fixed #1401: methods map and forEach of SparseMatrix not working
  correctly when indexes are unordered.
• Fixed #1404: inconsistent rounding of negative numbers.
• Upgrade tiny-emitter to v2.1.0 (#1397).

2019-01-25, version 5.4.2

• Fixed math.format not working for BigNumbers with a precision above
  1025 digits (see #1385). Thanks @​ericman314.
• Fixed incorrect LaTeX output of RelationalNode. Thanks @​rianmcguire.
• Fixed a bug the methods map, forEach, traverse, and transform
  of FunctionNode.

2019-01-10, version 5.4.1

• Fix #1378: negative bignumbers not formatted correctly.
• Upgrade fraction.js to version 4.0.12 (#1369).

2018-12-09, version 5.4.0

• Extended sum.js to accept a dimension input to calculate the sum over a
  specific axis. Thanks @​bnlcas.
• Fix #1328: objects can't be written multi-line. Thanks @​GHolk.
• Remove side effects caused by Unit.format and Unit.toString,
  making changes to the unit on execution. Thanks @​ericman314.

2018-12-03, version 5.3.1

• Fixed #1336: Unit.toSI() returning units with prefix like mm instead
  of m. Thanks @​ericman314.

2018-11-29, version 5.3.0

• Implemented function hasNumericValue. Thanks @​Sathish-kumar-Subramani.
• Fix #1326: non-ascii character in print.js.
• Fix #1337: math.format not working correctly with { precision: 0 }.
  Thanks @​dkenul.

2018-10-30, version 5.2.3

• Fixed #1293: non-unicode characters in escape-latex giving issues in some
  specific cases. Thanks @​dangmai.

... (truncated)

Commits

• 6c700d1 Publish v5.5.0
• 7d00987 Fix #1404: inconsistent rounding of negative numbers
• 69acb4f Fix #1401: bug in map and forEach of SparseMatrix not handling unordered inde...
• c4cb388 Updates in package-lock.json
• efd08a7 Update mocha to the latest version 🚀 (#1412)
• 6b0e4e1 Update webpack to the latest version 🚀 (#1410)
• 64de7e7 Use codecov to monitor code coverage (#1408)
• 38a6d78 Update webpack to the latest version 🚀 (#1405)
• 6ee3705 Update nyc to the latest version 🚀 (#1403)
• cfa22e2 Update babel7 to the latest version 🚀 (#1407)
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge
• @dependabot reopen will reopen this PR if it is closed
• @dependabot ignore this [patch|minor|major] version will close this PR and stop Dependabot creating any more for this minor/major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
• @dependabot use these labels will set the current labels as the default for future PRs for this repo and language
• @dependabot use these reviewers will set the current reviewers as the default for future PRs for this repo and language
• @dependabot use these assignees will set the current assignees as the default for future PRs for this repo and language
• @dependabot use this milestone will set the current milestone as the default for future PRs for this repo and language
• @dependabot badge me will comment on this PR with code to add a "Dependabot enabled" badge to your readme

Additionally, you can set the following in your Dependabot dashboard:

• Update frequency (including time of day and day of week)
• Automerge options (never/patch/minor, and dev/runtime dependencies)
• Pull request limits (per update run and/or open at any time)
• Out-of-range updates (receive only lockfile updates, if desired)
• Security updates (receive only security updates, if desired)

Finally, you can contact us by mentioning @dependabot.

[dependabot-preview]

Superseded by #121.