chore(deps): Update Rust crate divan to v0.1.21

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
divan	dev-dependencies	patch	0.1.17 -> 0.1.21

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Release Notes

nvzqz/divan (divan)

v0.1.21

Compare Source

Fixed

• Divan::skip_exact behaved incorrectly in v0.1.19.

Changed

• Improved handling of internal code around filters and those responsible for
  sacking the people who have just been sacked have been sacked.

v0.1.20

Compare Source

Fixed

• Divan::skip_regex accidentally dropped
  regex_lite::Regex
  and behaved incorrectly in v0.1.19.

v0.1.19

Compare Source

Fixed

• [cargo-nextest] no longer skips benchmarks with argument parameters ([#​75]).

Changed

• Organized positive and negative filters into a split buffer.

v0.1.18

Compare Source

Added

• Support for [cargo-nextest] running benchmarks as tests.

• [prelude] module for simplifying imports of [#[bench]][bench_attr],
  [#[bench_group]][bench_group_attr], [black_box], [black_box_drop],
  [AllocProfiler], [Bencher], and [Divan].

• Support wasi and emscripten targets.

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