feat: update swc_core to 58 (#579)

Author: SevereCloud

Cargo.lock

@@ -24,7 +24,7 @@ regex = "1"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 swc_cached = "2"
-swc_core = { version = "48", features = ["ecma_plugin_transform"] }
+swc_core = { version = "58", features = ["ecma_plugin_transform"] }
 
 # .cargo/config defines few alias to build plugin.
 # cargo build-wasip1 generates wasm-wasi32 binary

Cargo.toml

@@ -1,5 +1,5 @@
 [toolchain]
-channel = "nightly-2025-05-06"
+channel = "nightly-2026-02-26"
 components = ["clippy"]
 targets = ["wasm32-wasip1"]
 profile = "minimal"

rust-toolchain.toml

@@ -144,13 +144,11 @@ impl VisitMut for TransformVisitor {
         s.visit_mut_children_with(self);
 
         match s {
-            Stmt::Decl(Decl::Var(var)) => {
-                if var.decls.is_empty() {
-                    // Variable declaration without declarator is invalid.
-                    //
-                    // After this, `s` becomes `Stmt::Empty`.
-                    s.take();
-                }
+            Stmt::Decl(Decl::Var(var)) if var.decls.is_empty() => {
+                // Variable declaration without declarator is invalid.
+                //
+                // After this, `s` becomes `Stmt::Empty`.
+                s.take();
             }
             Stmt::Expr(expr) => {
                 if let Expr::Call(call) = &mut *expr.expr {