Update dependency jsonwebtoken to v7.2.0 - autoclosed

[dev-mend-for-github-com[bot]]

This PR contains the following updates:

Package	Type	Update	Change
jsonwebtoken	dependencies	minor	7.1.9 -> 7.2.0

By merging this PR, the issue #7 will be automatically resolved and closed:

Severity	CVSS Score	CVE
High	8.8	CVE-2018-3728

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Release Notes

auth0/node-jsonwebtoken

### [`v7.2.0`](https://togithub.com/auth0/node-jsonwebtoken/blob/HEAD/CHANGELOG.md#​720---2016-12-06) [Compare Source](https://togithub.com/auth0/node-jsonwebtoken/compare/v7.1.10...v7.2.0) - improve the documentation for expiration ([771e0b5f9bed90771fb79140eb38e51a3ecac8f0](https://togithub.com/auth0/node-jsonwebtoken/commit/771e0b5f9bed90771fb79140eb38e51a3ecac8f0)) - Restructured a sentence ([ccc7610187a862f7a50177eadc9152eef26cd065](https://togithub.com/auth0/node-jsonwebtoken/commit/ccc7610187a862f7a50177eadc9152eef26cd065)) - Allow `keyid` on `sign`. ([b412be91b89acb3a742bb609d3b54e47e1dfc441](https://togithub.com/auth0/node-jsonwebtoken/commit/b412be91b89acb3a742bb609d3b54e47e1dfc441)) - upgrade joi ([715e3d928023d414d45c6dc3f096a7c8448139ae](https://togithub.com/auth0/node-jsonwebtoken/commit/715e3d928023d414d45c6dc3f096a7c8448139ae)) - upgrade to latest nodes and Travis infrastructure ([3febcc1dd23ecdec1abbf89313959941d15eb47a](https://togithub.com/auth0/node-jsonwebtoken/commit/3febcc1dd23ecdec1abbf89313959941d15eb47a)) ### [`v7.1.10`](https://togithub.com/auth0/node-jsonwebtoken/blob/HEAD/CHANGELOG.md#​7110---2016-12-06) [Compare Source](https://togithub.com/auth0/node-jsonwebtoken/compare/v7.1.9...v7.1.10) - Bump node-jws version number ([07813dd7194630c9f452684279178af76464a759](https://togithub.com/auth0/node-jsonwebtoken/commit/07813dd7194630c9f452684279178af76464a759)) - improve the documentation for expiration ([771e0b5f9bed90771fb79140eb38e51a3ecac8f0](https://togithub.com/auth0/node-jsonwebtoken/commit/771e0b5f9bed90771fb79140eb38e51a3ecac8f0))

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