Fix languageserver for neovim by not borrowing method in IncomingMessage

[ModProg]

• add Context::iter_functions to languageserver feature
• fix languageserver for neovim by not borrowing method in IncomingMessage

[udoprog]

Huh, which method is being used? I thought all of them could be decoded verbatim 😄

[ModProg]

Huh, which method is being used? I thought all of them could be decoded verbatim smile

I guess they should be, but it sends the open event as textDocument\/didOpen which is apparently valid json.

[ModProg]

probably whatever json library they use is a bit eager to escape.

[udoprog]

All right, thank you!