fix(lib-classifier): expire classification session IDs

[eatyourgreens]

• fix the session ID tests so that they fail properly.
• fix getSessionID to pass the tests, by expiring a session ID after five minutes of inactivity.
• refactor generateSessionID so that it generates a session ID.
• refresh the session TTL whenever an annotation is updated.
• I added storedSession() and newSession() functions, to make it a little clearer what the code is doing.
• store/utils/session.js is now an ES module that can be copied straight into PFE. PFE and the monorepo both share the same session_id object in session storage, so the session code has to be synchronised for both repo's.

Please request review from @zooniverse/frontend team or an individual member of that team.

Package

• lib-classifier

Linked Issue and/or Talk Post

• fixes Classification session IDs don't expire after 5 minutes of inactivity #6503.
• linked discussion: Standardize third party libraries for generating string hash and unique ids #6493 (comment)
• this PR is an alternative to Classifier: Remove the faulty session id code #6499, which sets a constant session ID for all classifications made in the same tab, regardless of inactivity.

How to Review

All classifications made in a single session should still have the same session ID here. The difference from #6499 is that a new session ID should be generated if you do nothing for 5 minutes. It should be possible to record multiple classification sessions from a single browser session in the same tab.

Checklist

PR Creator - Please cater the checklist to fit the review needed for your code changes.
PR Reviewer - Use the checklist during your review. Each point should be checkmarked or discussed before PR approval.

General

• Tests are passing locally and on Github
• Documentation is up to date and changelog has been updated if appropriate
• You can yarn panic && yarn bootstrap or docker-compose up --build and FEM works as expected
• FEM works in all major desktop browsers: Firefox, Chrome, Edge, Safari (Use Browserstack account as needed)
• FEM works in a mobile browser

General UX

Example Staging Project: i-fancy-cats

• All pages of a FEM project load: Home Page, Classify Page, and About Pages
• Can submit a classification
• Can sign-in and sign-out
• The component is accessible
  • Can be used with a screen reader BBC guide to VoiceOver
  • Can be used from the keyboard WebAIM guide to keyboard testing
  • It is passing accessibility checks in the storybook

Bug Fix

• The PR creator has listed user actions to use when testing if bug is fixed
• The bug is fixed
• Unit tests are added or updated

[coveralls]

coverage: 77.798% (-0.02%) from 77.818%
when pulling 509481e on eatyourgreens:fix-session-id
into 9294f0c on zooniverse:master.

[eatyourgreens]

These lines are left over from when I was debugging expired auth sessions in Beyond Borders, a long time ago. I forgot to remove them when I was finished.