Neovim support

[kdheepak]

This is the error I'm getting when I try to install it right now in neovim.

Error detected while processing /Users/USER/.local/share/nvim/plugged/vim-strip-trailing-whitespace/plugin/strip_trailing_whitespace.vim:
line    2:
E492: Not an editor command: scriptversion 4
Error detected while processing function <SNR>96_OnBufEnter:
line    4:
E117: Unknown function: listener_add
Press ENTER or type command to continue

I'm assuming this is a neovim / vim difference? Are you planning to support neovim?

Thanks for making this plugin!

[axelf4]

Neovim is something I want to support, but it's not my highest priority.

The incompatibility stems from Vim and Neovim having different API:s for listening to buffer changes. The corresponding Neovim API seems to be nvim_buf_attach. scriptversion 4 is nonobligatory and not an issue.

First step would be to get CI to run tests on Neovim too while allowing failures.

[kdheepak]

Awesome! Thanks!