fix(deps): update rust crate proc-macro2 to v1.0.88

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
proc-macro2	dependencies	patch	1.0.87 -> 1.0.88

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Release Notes

dtolnay/proc-macro2 (proc-macro2)

v1.0.88

Compare Source

• Return accurate line and column from Span::start and Span::end inside proc macros on nightly (#​472)

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[github-actions]

GNU testsuite comparison:

Congrats! The gnu test tests/timeout/timeout is no longer failing!