Auto merge of #138 - cuviper:autocfg-1, r=Amanieu

Upgrade to autocfg 1

Author: bors

Cargo.toml

@@ -26,7 +26,7 @@ compiler_builtins = { version = "0.1.2", optional = true }
 alloc = { version = "1.0.0", optional = true, package = "rustc-std-workspace-alloc" }
 
 [build-dependencies]
-autocfg = "0.1.4"
+autocfg = "1"
 
 [dev-dependencies]
 lazy_static = "1.2"