Fix default diagnostic severity

Author: autozimu

src/language_server_protocol.rs

@@ -638,10 +638,7 @@ impl LanguageClient {
             let mut match_groups: HashMap<_, Vec<_>> = HashMap::new();
 
             for dn in diagnostics {
-                let severity = dn
-                    .severity
-                    .unwrap_or(DiagnosticSeverity::Information)
-                    .to_int()?;
+                let severity = dn.severity.unwrap_or(DiagnosticSeverity::Hint).to_int()?;
                 match_groups
                     .entry(severity)
                     .or_insert_with(Vec::new)

src/sign.rs

@@ -13,7 +13,7 @@ impl From<&Diagnostic> for Sign {
         let line = diagnostic.range.start.line;
         let severity = diagnostic.severity.unwrap_or(DiagnosticSeverity::Hint);
         let name = format!("LanguageClient{:?}", severity);
-        let id = 75_000 + line * DiagnosticSeverity::Information as u64 + severity as u64;
+        let id = 75_000 + line * DiagnosticSeverity::Hint as u64 + severity as u64;
 
         Sign { id, line, name }
     }