4739: Declare required lsp-server dependency of rust-analyzer crate r=jonas-schievink a=dtolnay
My codebase already depended on lsp-server and introducing a dependency on rust-analyzer failed at first because it assumes some functions that were first present in lsp-server 0.3.2.
Without this change:
```console
error[E0599]: no method named `initialize_start` found for struct `lsp_server::Connection` in the current scope
--> crates/rust-analyzer/./src/bin/main.rs:83:57
|
83 | let (initialize_id, initialize_params) = connection.initialize_start()?;
| ^^^^^^^^^^^^^^^^ method not found in `lsp_server::Connection`
error[E0599]: no method named `initialize_finish` found for struct `lsp_server::Connection` in the current scope
--> crates/rust-analyzer/./src/bin/main.rs:99:16
|
99 | connection.initialize_finish(initialize_id, initialize_result)?;
| ^^^^^^^^^^^^^^^^^ method not found in `lsp_server::Connection`
```
Co-authored-by: David Tolnay <dtolnay@gmail.com>
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