Patch proc-macro-crate 2 to proc-macro-crate 3

Updates toml_edit to 0.21.

patches/proc-macro-crate/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "proc-macro-crate"
+version = "2.0.1"
+description = "Patches proc-macro-crate 2 to 3"
+license = "MIT"
+repository = "https://github.com/serai-dex/serai/tree/develop/patches/proc-macro-crate"
+authors = ["Luke Parker <lukeparker5132@gmail.com>"]
+keywords = []
+edition = "2021"
+rust-version = "1.66"
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
+[dependencies]
+proc-macro-crate = "3"

patches/proc-macro-crate/src/lib.rs

@@ -0,0 +1 @@
+pub use proc_macro_crate::*;