Bump proc-macro2 from 1.0.82 to 1.0.83 #110

Job	Run time
set-image	1s
fmt	1m 31s
clippy	2m 2s
bench-rust-nightly (bit-vec)	18m 33s
checks	1m 33s
bench-rust-nightly (bytes)	17m 29s
miri (bit-vec)	50m 26s
bench-rust-nightly (generic-array)	17m 39s
tests	3m 9s
miri (bytes)	3m 5s
bench-rust-nightly (derive)	17m 45s
miri (generic-array)	3m 20s
bench-rust-nightly (max-encoded-len)	17m 29s
miri (arbitrary)	3m 1s
build-linux-ubuntu-amd64	1m 26s
publish-dry-run	1m 21s
	2h 39m 50s

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