[CR] Add Dependabot & update to higher versions

[Mittelblut9]

Hello👋

i went through the current used dependencies and i saw some very highly risk used dependencies versions.

For Example postgres:

"postgres": "^1.0.2",

The latest version currently is: 3.3.1

The same for many other deps. By installing the Dependabot you will get updates automatically as a pull request. That makes your app way safer then it is atm. And you are not stuck at functions that are gone since the dinosaurs were killed.

Maybe this is some change for V2. But its one of the most important thing you have to have. Especially as an online game.

Thanks!