Merge #7648

7648: fix nightly warning `legacy_derive_helpers` r=jonas-schievink a=peddermaster2

With a recent nightly (e.g. 2021-02-10) a warning comes up. This PR reorders the attributes to fix the warning.

See rust-lang/rust#79202

Co-authored-by: Peter Wischer <peter.wischer@lwl.org>

crates/rust-analyzer/src/lsp_ext.rs

@@ -230,8 +230,8 @@ pub struct SsrParams {
 
 pub enum StatusNotification {}
 
-#[serde(rename_all = "camelCase")]
 #[derive(Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
 pub enum Status {
     Loading,
     ReadyPartial,