vim: update plugins
vim: update plugins

Add:

- mango: syntax highlight for JS
- dracula: dracula syntax highlight
- nerdcommenter: comment/uncomment utilies
- editorconfig: support for .editorconfig files
- vim-json: JSON management
- typescript-vim: TypeScript syntax highlight
- vim-markdown: markdown support
- vim-grammarous: grammar analyser
- i3-vim-syntax: i3 config file syntax highlight

anchnk/dotfiles,anchnk/dotfiles,anchnk/dotfiles