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

---------

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

scripts/gdpr-delete-users.js

@@ -44,6 +44,7 @@ async function deleteHabiticaData (user, email) {
     { _id: user._id },
     { $set: set },
   );
+  // eslint-disable-next-line no-promise-executor-return
   await new Promise(resolve => setTimeout(resolve, 1000));
   const response = await axios.delete(
     `${BASE_URL}/api/v3/user`,
@@ -96,6 +97,7 @@ async function processEmailAddress (email) {
     return console.log(`No users found with email address ${email}`);
   }
 
+  // eslint-disable-next-line no-promise-executor-return
   await new Promise(resolve => setTimeout(resolve, 1000));
   return Promise.all(users.map(user => (async () => {
     await deleteAmplitudeData(user._id, email); // eslint-disable-line no-await-in-loop