0.5

• api break: put spawn in the server itself, not IO
• require OCaml 4.14
• migrate to lsp 1.17
• support inlay hints
• internal tracing with trace
• [#24] Expose get_uri for notify_back
• expose log source
• [#22] Threat shutdown and exit requests correctly
• [#20] Handle messages with null value for "params" field
• Handle server requests
• handle workDoneTokens