Toggle :terminal for Vim8 or later
Plug 'pakutoma/toggle-terminal'
" map <C-@> to toggle
tnoremap <silent> <C-@> <C-w>:ToggleTerminal<CR>
nnoremap <silent> <C-@> :ToggleTerminal<CR>
" set your favorite shell
let g:toggle_terminal#command = 'powershell'
" set terminal window position
" (see possible options at :help vertical)
let g:toggle_terminal#position = 'topleft'