Bump trybuild from 1.0.98 to 1.0.99 #158

Job	Run time
set-image	1s
fmt	58s
checks	1m 26s
bench-rust-nightly (bit-vec)	18m 9s
clippy	1m 25s
bench-rust-nightly (bytes)	16m 39s
miri (bit-vec)	5h 31m 7s
bench-rust-nightly (generic-array)	17m 3s
miri (bytes)	3m 20s
tests	2m 57s
bench-rust-nightly (derive)	16m 52s
miri (generic-array)	3m 11s
bench-rust-nightly (max-encoded-len)	16m 52s
miri (arbitrary)	3m 14s
build-linux-ubuntu-amd64	1m 14s
publish-dry-run	1m 20s
	7h 15m 48s

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