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>

website/common/script/fns/randomDrop.js

@@ -57,7 +57,8 @@ export default function randomDrop (user, options, req = {}, analytics) {
     // +50% per checklist item complete. TODO: make this into X individual drop chances instead
     * (user._tmp.crit || 1)
     * (1 + 0.5 * (reduce(
-      task.checklist, (m, i) => m + (i.completed ? 1 : 0), // eslint-disable-line indent
+      task.checklist,
+(m, i) => m + (i.completed ? 1 : 0), // eslint-disable-line indent
       0,
 ) || 0)); // eslint-disable-line indent
   chance = diminishingReturns(chance, 0.75);