fix(macros-core): use of undeclared tracked_path

Author: wiklee

sqlx-macros-core/src/lib.rs

@@ -14,6 +14,11 @@
 //! And then make releases in lockstep with `sqlx-core`. We recommend all driver crates, in-tree
 //! or otherwise, use the same version numbers as `sqlx-core` to avoid confusion.
 
+#![cfg_attr(
+    any(sqlx_macros_unstable, procmacro2_semver_exempt),
+    feature(track_path)
+)]
+
 use once_cell::sync::Lazy;
 
 use crate::query::QueryDriver;

sqlx-macros-core/src/migrate.rs

@@ -1,3 +1,6 @@
+#[cfg(any(sqlx_macros_unstable, procmacro2_semver_exempt))]
+extern crate proc_macro;
+
 use proc_macro2::TokenStream;
 use quote::{quote, ToTokens, TokenStreamExt};
 use sha2::{Digest, Sha384};