chore(deps): update rust crate rstest to 0.18.2

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
rstest	dev-dependencies	patch	0.18.1 -> 0.18.2

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Release Notes

la10736/rstest (rstest)

v0.18.2

Compare Source

Changed

• Now #[files] accept also parent folders (see #​205
  for more details).

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