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>

test/helpers/common.helper.js

@@ -1,11 +1,9 @@
-import mongoose from 'mongoose';
-
 import { model as User } from '../../website/server/models/user';
 import {
-  DailySchema,
-  HabitSchema,
-  RewardSchema,
-  TodoSchema,
+  daily as Daily,
+  habit as Habit,
+  reward as Reward,
+  todo as Todo,
 } from '../../website/server/models/task';
 
 export { translate } from './translate';
@@ -17,25 +15,17 @@ export function generateUser (options = {}) {
 }
 
 export function generateDaily (options = {}) {
-  const Daily = mongoose.model('Daily', DailySchema);
-
   return new Daily(options).toObject();
 }
 
 export function generateHabit (options = {}) {
-  const Habit = mongoose.model('Habit', HabitSchema);
-
   return new Habit(options).toObject();
 }
 
 export function generateReward (options = {}) {
-  const Reward = mongoose.model('Reward', RewardSchema);
-
   return new Reward(options).toObject();
 }
 
 export function generateTodo (options = {}) {
-  const Todo = mongoose.model('Todo', TodoSchema);
-
   return new Todo(options).toObject();
 }