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/libs/sleep.js

@@ -2,7 +2,7 @@
 // the test:unit can't be compiled
 // so the sleepAsync can't be used here (to prevent duplicated code)
 
-export default function (seconds = 1) {
+export default function sleep (seconds = 1) {
   const milliseconds = seconds * 1000;
 
   return new Promise(resolve => {