Upgrade to mongoose 7 (#14971)

* remove some unused dependencies

* update mongoose version

* make common tests pass

* Make unit tests pass

* make api v3 integration tests pass

* fix lint issues

* fix issue with package-lock

* fix(lint): we don't need no .js

* fix(lint): update to latest config-habitrpg

* chore(npm): update package locks

* fix(test): replace deprecated fn

* chore(package): update eslint-habitrpg again

* fix(lint): server linting

* fix(lint): client linting

* fix(client): correct mangled common imports

* chore(npm): update package-locks

* fix(lint): punctuation, module

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Co-authored-by: SabreCat <sabrecat@gmail.com>
Co-authored-by: SabreCat <sabe@habitica.com>

website/server/controllers/api-v3/challenges.js

@@ -777,7 +777,8 @@ api.exportChallengeCsv = {
     // repeated n times for the n challenge tasks
     const challengeTasks = _.reduce(
       challenge.tasksOrder.toObject(),
-      (result, array) => result.concat(array), [],
+      (result, array) => result.concat(array),
+      [],
     ).sort();
     resArray.unshift(['UUID', 'Display Name', 'Username']);