* [test/database/list] Fix test list 4 being used in two different tests
* [database/postgres] PostgreSQL database driver
* [database/postgres] Make transactions work based on continuation scope.
* [database/postgres] Implement nested transactions
* eslint --fix
* Add database changes from earlier this week to the PostgreSQL driver.
* Fix typo
* Fix postgres.incrObjectFieldBy returning undefined instead of null when given NaN
* [database/postgres] Fix sortedSetsCard returning an array of strings.
* Update socket.io postgres adapter
* Fix PostgreSQL erroring when multiple updates are made to the same sorted set entry in a single operation.
Add a test case to catch this error.
* Fix lint errors.
* Only prune sessions on one instance in a cluster to avoid deadlocks.
They're caught and handled by the database server, but they spam the logs.
* Fix arguments.slice.
* Support npm@5 and yarn
Use package.default.json
Partial #6008
- Overwrite package.json with package.default.json values
- `dependencies` field is merged with package.default.json version taking precidence
- `./nodebb upgrade` automatically does those things and runs `git pull`
- use `./nodebb upgrade --dev` to avoid the `git pull`
* added logic to preserve extraneous plugins installed in node_modules/
* Don't automatically git pull
* Simplify package-install, run it on upgrade just in case