Bump trybuild from 1.0.86 to 1.0.88 (#563) #1

Job	Run time
set-image	1s
checks	3m 46s
clippy	3m 57s
bench-rust-nightly (bit-vec)	17m 59s
miri (bit-vec)	47m 10s
bench-rust-nightly (bytes)	19m 7s
miri (bytes)	2m 59s
tests	5m 13s
bench-rust-nightly (generic-array)	16m 56s
miri (generic-array)	5m 3s
bench-rust-nightly (derive)	17m 17s
miri (arbitrary)	3m 2s
bench-rust-nightly (max-encoded-len)	17m 0s
build-linux-ubuntu-amd64	3m 36s
publish-dry-run	3m 24s
	2h 46m 30s

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