bump json-jwt to 1.13.0
bump json-jwt to 1.13.0

https://github.com/nov/json-jwt/compare/v1.11.0...v1.13.0

refs FOO-1219
flag = none
test plan: specs pass

Change-Id: Ie8ca733dd252c8976e232e97f53bd82409e4a892
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/252974
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
Reviewed-by: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>
QA-Review: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>
Product-Review: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>

sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms