Update to edition 2021

Except there's some issues with parser macros preventing it for
schala-language

schala-lang/language/src/lib.rs

@@ -1,6 +1,6 @@
 #![feature(trace_macros)]
 //#![feature(unrestricted_attribute_tokens)]
-#![feature(box_patterns, box_syntax)]
+#![feature(box_patterns, box_syntax, iter_intersperse)]
 
 //! `schala-lang` is where the Schala programming language is actually implemented.
 //! It defines the `Schala` type, which contains the state for a Schala REPL, and implements

schala-repl/Cargo.toml

@@ -2,8 +2,7 @@
 name = "schala-repl"
 version = "0.1.0"
 authors = ["greg <greg.shuflin@protonmail.com>"]
-edition = "2018"
-resolver = "2"
+edition = "2021"
 
 [dependencies]
 llvm-sys = "70.0.2"

schala-repl/src/lib.rs

@@ -1,4 +1,4 @@
-#![feature(box_patterns, box_syntax, proc_macro_hygiene, decl_macro)]
+#![feature(box_patterns, box_syntax, proc_macro_hygiene, decl_macro, iter_intersperse)]
 #![feature(plugin)]
 
 #[macro_use]