split -server and -tls msrv and raise to 1.52 (#398)

actix-macros/Cargo.toml

@@ -22,4 +22,5 @@ syn = { version = "^1", features = ["full"] }
 actix-rt = "2.0.0"
 
 futures-util = { version = "0.3.7", default-features = false }
+rustversion = "1"
 trybuild = "1"

actix-macros/src/lib.rs

@@ -198,5 +198,5 @@ pub fn test(args: TokenStream, item: TokenStream) -> TokenStream {
 fn input_and_compile_error(mut item: TokenStream, err: syn::Error) -> TokenStream {
     let compile_err = TokenStream::from(err.to_compile_error());
     item.extend(compile_err);
-    return item;
+    item
 }

actix-macros/tests/trybuild.rs

@@ -1,3 +1,4 @@
+#[rustversion::stable(1.46)] // MSRV
 #[test]
 fn compile_macros() {
     let t = trybuild::TestCases::new();