Testers needed for new feature: NEP-1-like indentation, and some small auto indenting improvements.
Small demo of how this acts: [https://asciinema.org/a/RXbwCTJXGRKEhMRiHIUEoDGd7](https://asciinema.org/a/RXbwCTJXGRKEhMRiHIUEoDGd7) The code currently resides in `indentexp` branch on [Github](https://github.com/alaviss/nim.nvim/tree/indentexp). Please give this a try and report back for any bugs / unwanted indents. If everything goes well I'll merge this into `master`.
