fix cargo test no default features in v0.6.x #5004

Job	Run time
check-docs	32s
check	43s
cargo-hack	7m 13s
cargo-public-api-crates (axum)	52s
dependencies-are-sorted	44s
cargo-deny check (advisories)	18s
cargo-public-api-crates (axum-core)	38s
Spell Check with Typos	4s
cargo-deny check (bans licenses sources)	16s
cargo-public-api-crates (axum-extra)	48s
cargo-public-api-crates (axum-macros)	41s
armv5te-unknown-linux-musleabi	0s
test-msrv	0s
test-nightly	0s
test-docs	0s
test-versions	0s
wasm32-unknown-unknown	0s
	12m 49s

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