Lift parse.rs and lookahead.rs into syn
diff --git a/tests/test_ident.rs b/tests/test_ident.rs
index c2e2d9e..498e8be 100644
--- a/tests/test_ident.rs
+++ b/tests/test_ident.rs
@@ -11,7 +11,7 @@
 
 use proc_macro2::{Ident, Span, TokenStream};
 use std::str::FromStr;
-use syn::error::Error;
+use syn::parse::Error;
 
 fn parse(s: &str) -> Result<Ident, Error> {
     syn::parse2(TokenStream::from_str(s).unwrap())