der

der_derive: add workaround for `syn` v2.0.73 #2978

Job	Run time
minimal-versions	0s
derive (1.71.0)	23s
build (1.71.0, thumbv7em-none-eabi)	1m 36s
derive (stable)	21s
build (1.71.0, wasm32-unknown-unknown)	1m 32s
build (stable, thumbv7em-none-eabi)	1m 26s
test (i686-unknown-linux-gnu, ubuntu-latest, 1.71.0, sudo apt update && sudo apt install gcc-mult...	11m 7s
build (stable, wasm32-unknown-unknown)	1m 19s
test (i686-unknown-linux-gnu, ubuntu-latest, stable, sudo apt update && sudo apt install gcc-mult...	9m 56s
test (x86_64-unknown-linux-gnu, ubuntu-latest, 1.71.0)	10m 52s
test (x86_64-unknown-linux-gnu, ubuntu-latest, stable)	9m 52s
	48m 24s

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