Rollup merge of #58288 - taiki-e:rustc-workspace-hack-2018, r=alexcrichton
rustc-workspace-hack => 2018
Transitions `rustc-workspace-hack` to Rust 2018; cc #58099
r? @alexcrichton
diff --git a/src/tools/rustc-workspace-hack/Cargo.toml b/src/tools/rustc-workspace-hack/Cargo.toml
index f5eeddd..f943ac9 100644
--- a/src/tools/rustc-workspace-hack/Cargo.toml
+++ b/src/tools/rustc-workspace-hack/Cargo.toml
@@ -6,6 +6,7 @@
description = """
Hack for the compiler's own build system
"""
+edition = "2018"
[lib]
path = "lib.rs"
