Note which crates in our public API are 1.0

So we know at least which other crates have to 1.0 before axum can be,
or which we have to remove from our public API.

axum-core/Cargo.toml

@@ -47,11 +47,14 @@ tower-http = { version = "0.5.0", features = ["limit"] }
 
 [package.metadata.cargo-public-api-crates]
 allowed = [
+    # not 1.0
     "futures_core",
-    "http",
-    "bytes",
-    "http_body",
     "tower_layer",
+
+    # >=1.0
+    "bytes",
+    "http",
+    "http_body",
 ]
 
 [package.metadata.docs.rs]

axum/Cargo.toml

@@ -179,19 +179,24 @@ features = [
 
 [package.metadata.cargo-public-api-crates]
 allowed = [
-    "async_trait",
+    # our crates
     "axum_core",
     "axum_macros",
-    "bytes",
+
+    # not 1.0
     "futures_core",
     "futures_sink",
     "futures_util",
+    "tower_layer",
+    "tower_service",
+
+    # >=1.0
+    "async_trait",
+    "bytes",
     "http",
     "http_body",
     "serde",
     "tokio",
-    "tower_layer",
-    "tower_service",
 ]
 
 [[bench]]