Add textDocument/publishDiagnostics

[angelozerr]

Please add textDocument/publishDiagnostics feature. Thanks!

[prabirshrestha]

Currently I'm mainly focusing on features that is supported by vim-lsp so it will take me some time before I work on this feature since vim-lsp doesn't support diagnostics yet. But if anyone sends a PR I would be happy to merge it.

[angelozerr]

Thanks @prabirshrestha for you answer! I will try to do a PR if I decide to use typescript-language-server. Many thanks for your work!

[prabirshrestha]

available in https://github.com/theia-ide/typescript-language-server