Upgrade lodash to v4 and lint more files (#8495)

* common: import lodash modules separately

* remove test/content from .eslintignore, fix with eslint --fix content/index

* lint test/content

* lint content/index except for lodash methods

* upgrade server/models

* upgrade server/middlewares and server/libs

* port server/controllers/top-level

* port server/controllers/api-v3

* port views and tests

* client old port lodash and _(, missing _.

* upgrade client-old

* port common/script (root level files only)

* port common/script/fns

* port common/libs

* port common/script/ops

* port common/script/content and common/script/libs/shops.js

* misc fixes

* misc fixes

* misc fixes

* more tests fixes

* fix payments test stubbing, down to 2 failing tests

* remove more instances of lodash wrapping

* fix bug where toObject does not clone object

* fix tests

* upgrade migration or add lodash 4 note

* update shrinkwrap

* fix linting

* upgrade eslint-config-habitrpg

* update shrinkwrap

* recompile shrinkwrap

website/common/script/fns/updateStats.js

@@ -1,4 +1,4 @@
-import _ from 'lodash';
+import each from 'lodash/each';
 import {
   MAX_HEALTH,
   MAX_STAT_POINTS,
@@ -67,7 +67,7 @@ module.exports = function updateStats (user, stats, req = {}, analytics) {
       user.items.eggs.Wolf = 1;
     }
   }
-  _.each({
+  each({
     vice1: 30,
     atom1: 15,
     moonstone1: 60,