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/server/controllers/api-v3/groups.js

@@ -704,7 +704,7 @@ async function _inviteByUUID (uuid, group, inviter, req, res) {
   }
 
   if (group.type === 'guild') {
-    if (_.contains(userToInvite.guilds, group._id)) {
+    if (_.includes(userToInvite.guilds, group._id)) {
       throw new NotAuthorized(res.t('userAlreadyInGroup'));
     }
     if (_.find(userToInvite.invitations.guilds, {id: group._id})) {

website/server/controllers/api-v3/tasks.js

@@ -574,7 +574,7 @@ api.scoreTask = {
     let savedUser = results[0];
 
     let userStats = savedUser.stats.toJSON();
-    let resJsonData = _.extend({delta, _tmp: user._tmp}, userStats);
+    let resJsonData = _.assign({delta, _tmp: user._tmp}, userStats);
     res.respond(200, resJsonData);
 
     taskScoredWebhook.send(user.webhooks, {