cmpv2

der: fixup windows `write_secret_file` helper (#1372) #18

Job	Run time
build (1.75.0, thumbv7em-none-eabi)	37s
minimal-versions	0s
build (1.75.0, wasm32-unknown-unknown)	34s
test (1.75.0)	7m 34s
build (stable, thumbv7em-none-eabi)	29s
test (stable)	7m 23s
build (stable, wasm32-unknown-unknown)	30s
	17m 7s

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