Allow easier overriding of default filetypes for LSP

[Numkil]

Hi,

For some language servers it makes sense to override the default filetypes that they attach too. For example when editing a twig file it is nice to have the html language server attached to the buffer.

With this little addition to the setup_handlers function you can just put the filetypes configuration in the server configuration defined above and it will work. If you don't specify filetypes on your lsp config the value set will be nil and the default behavior will occur.

[feoh]

This looks good to me, would you please add an example use case to the README under Configuration And Extension
?

Thanks a bunch!

[feoh]

Sorry to be a pest, but you want 'attach to' not 'attach to' otherwise looks great!

[feoh]

Hi I'm sorry but rather than correcting the spelling error you removed the docs entirely.

[Numkil]

Hi @feoh Sorry its late in the evening for me and I accidentally rebased my PR on the wrong branch because i was not paying attention :) I fixed it now!

[feoh]

No worries! Thanks for your patience and thanks for the contribution! I've actually got a couple use cases for this myself :)

[feoh]

Hi.

Unfortunately after laboriously merging down your PR into my fork, I discovered it breaks if you don't do any of these overrides. I now get:

Error detected while processing /Users/cpatti/.config/nvim/init.lua:
/Users/cpatti/.config/nvim/init.lua:467: attempt to index a nil value
/Users/cpatti/.config/nvim/init.lua:467: attempt to index a nil value
/Users/cpatti/.config/nvim/init.lua:467: attempt to index a nil value
/Users/cpatti/.config/nvim/init.lua:467: attempt to index a nil value

On startup, which isn't great :(

Unless you make a new PR with a fix in a few hours, I'll revert your commit this evening.

Thanks and apoligies to anyone who gets this broken kickstart. My bad for not testing it thoroughly outside my fork.

[feoh]

I filed #375 to track this issue. Please resolve it with details if you make the fix, or I'll include reversion details if I end up doing that this evening.