Use type_alias_impl_trait instead of min in compiler and lib

Author: spastorino

alloc/src/lib.rs

@@ -141,7 +141,8 @@
 #![feature(alloc_layout_extra)]
 #![feature(trusted_random_access)]
 #![feature(try_trait_v2)]
-#![feature(min_type_alias_impl_trait)]
+#![cfg_attr(bootstrap, feature(min_type_alias_impl_trait))]
+#![cfg_attr(not(bootstrap), feature(type_alias_impl_trait))]
 #![feature(associated_type_bounds)]
 #![feature(slice_group_by)]
 #![feature(decl_macro)]