fix(deps): update dependency jsonwebtoken to v8.5.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
jsonwebtoken	dependencies	minor	8.4.0 -> 8.5.0	source

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Release Notes

auth0/node-jsonwebtoken

### [`v8.5.0`](https://togithub.com/auth0/node-jsonwebtoken/blob/master/CHANGELOG.md#​850---2019-02-20) [Compare Source](https://togithub.com/auth0/node-jsonwebtoken/compare/v8.4.0...v8.5.0) ##### New Functionality - feat: add PS JWA support for applicable node versions ([#​573](https://togithub.com/auth0/node-jsonwebtoken/issues/573)) ([eefb9d9c6eec54718fa6e41306bda84788df7bec](https://togithub.com/auth0/node-jsonwebtoken/commit/eefb9d9c6eec54718fa6e41306bda84788df7bec)), closes [#​573](https://togithub.com/auth0/node-jsonwebtoken/issues/573) - Add complete option in jwt.verify ([#​522](https://togithub.com/auth0/node-jsonwebtoken/issues/522)) ([8737789dd330cf9e7870f4df97fd52479adbac22](https://togithub.com/auth0/node-jsonwebtoken/commit/8737789dd330cf9e7870f4df97fd52479adbac22)), closes [#​522](https://togithub.com/auth0/node-jsonwebtoken/issues/522) ##### Test Improvements - Add tests for private claims in the payload ([#​555](https://togithub.com/auth0/node-jsonwebtoken/issues/555)) ([5147852896755dc1291825e2e40556f964411fb2](https://togithub.com/auth0/node-jsonwebtoken/commit/5147852896755dc1291825e2e40556f964411fb2)), closes [#​555](https://togithub.com/auth0/node-jsonwebtoken/issues/555) - Force use_strict during testing ([#​577](https://togithub.com/auth0/node-jsonwebtoken/issues/577)) ([7b60c127ceade36c33ff33be066e435802001c94](https://togithub.com/auth0/node-jsonwebtoken/commit/7b60c127ceade36c33ff33be066e435802001c94)), closes [#​577](https://togithub.com/auth0/node-jsonwebtoken/issues/577) - Refactor tests related to jti and jwtid ([#​544](https://togithub.com/auth0/node-jsonwebtoken/issues/544)) ([7eebbc75ab89e01af5dacf2aae90fe05a13a1454](https://togithub.com/auth0/node-jsonwebtoken/commit/7eebbc75ab89e01af5dacf2aae90fe05a13a1454)), closes [#​544](https://togithub.com/auth0/node-jsonwebtoken/issues/544) - ci: remove nsp from tests ([#​569](https://togithub.com/auth0/node-jsonwebtoken/issues/569)) ([da8f55c3c7b4dd0bfc07a2df228500fdd050242a](https://togithub.com/auth0/node-jsonwebtoken/commit/da8f55c3c7b4dd0bfc07a2df228500fdd050242a)), closes [#​569](https://togithub.com/auth0/node-jsonwebtoken/issues/569) ##### Docs - Fix 'cert' token which isn't a cert ([#​554](https://togithub.com/auth0/node-jsonwebtoken/issues/554)) ([0c24fe68cd2866cea6322016bf993cd897fefc98](https://togithub.com/auth0/node-jsonwebtoken/commit/0c24fe68cd2866cea6322016bf993cd897fefc98)), closes [#​554](https://togithub.com/auth0/node-jsonwebtoken/issues/554)

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