Bump jsonwebtoken package to version 9.0.0

Fix logout/login issue

Update xss-handler middleware

Remove validator package and add xss package

Add deleteAll static function and refactor JobsAPI

Remove verifyJwt static function

Add function to remove all jobs by user id

Add more padding and increase font-size of Job

Fix verifyUser function

Remove the verify endpoint

Update README.md

Add calculateDaysBetweenDates function

Add Dark mode

Add creation and update dates to Job

Add netlify.toml