tower-lsp 0.8.0

Added

• Implement support for the following client-to-server messages:
  • textDocument/willSave
  • completionItem/resolve
  • textDocument/documentSymbol
  • textDocument/codeAction
  • textDocument/codeLens
  • codeLens/resolve
  • textDocument/formatting

Changed

• LspService::call() stops serving requests after exit notification, meaning there is no longer a need for ExitReceiver::run_until_exit and the Server::serve() async method can now be awaited directly (PR #117).
• Return Option<String> as service response type (PR #116).
• Disable unused nom features for a hopefully lighter build (PR #112).
• Link to current version of LSP specification in doc comments (PR #122).

Fixed

• Correctly handle backpressure using Service::poll_ready() (PR #117).

Removed

• Remove ExitReceiver type and LspService::close_handle() method (PR #117).