chore(deps): update rstest requirement from 0.7 to 0.12

[dependabot[bot]]

Updates the requirements on rstest to permit the latest version.

Release notes

Sourced from rstest's releases.

0.12.0

Introduce #[once] fixture attribute

Changelog

Sourced from rstest's changelog.

[0.12.0] 2021/12/12

Add

• Add #[once] fixture attribute to create static fixtures (See #119)

Fixed

• Fixed check of available features before to enable macro diagnostic (See #126)

[0.11.0] 2021/08/01

Fixed

• use mutable fixture in in cases and value list (See #121)

[0.10.0] 2021/05/16

Add

• Rename fixture (See #107 and #108)

Fixed

• Wired behaviour in #[fixture] with generics types that have transitive reference (See #116)

[0.9.0] 2021/05/2

Add

• #[future] arg attribute to remove impl Future<> boilerplate. (See #98)

[0.8.0] 2021/4/25

Add

• Magic Conversion: use literal string for define values where type implements FromStr trait (See #111)

Changed

• #[default] arg attribute cannot use key = arbitrary rust expression syntax (is unstable rust-lang/rust#78835). So we switched to #[default(expression)] syntax. (See #117)

Fixed

• #117 introduced an unstable syntax

... (truncated)

Commits

• 2e3a3d5 Typografic fix
• 7698de6 Update changelog
• 78678ea Fixed Clippy warning
• 21112cf Close #126
• 93a6c8a Simplified test
• ff10621 #130 Close ... test and fix
• c34d94a Fix fixture for 1.57.0
• 1fbf794 #119 Docs
• 3a836a4 Fixed docs
• 0fb498f #119 Implemented error handling in for generics
• Additional commits viewable in compare view

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