Update regress requirement from 0.7.1 to 0.8.0

[dependabot[bot]]

Updates the requirements on regress to permit the latest version.

Release notes

Sourced from regress's releases.

v0.8.0

Version 0.8.0 of regress, REGex in Rust with EmcaScript Syntax.

• Fix a bug in case folding characters given by escapes (https://github.com/ridiculousfish/regress/commit/8b842f1c972fb1ba80dc857816a403baf2aa34a8)
• Correct case folding (https://github.com/ridiculousfish/regress/commit/56233d6bd8c8795d4c8f01329ead0c0f1bc804e0)
• Correct first-byte computation for interval (https://github.com/ridiculousfish/regress/commit/4858a1b32348b1a5c5d85d978151c7caf73fb739)
• Implement Unicode Character Classes in Brackets (ridiculousfish/regress#71)
• Fix multiple escape parsing issues (ridiculousfish/regress#76)
• Implement UTF-16 based matching (ridiculousfish/regress#75)
• Correctly reject characters in Atom PatternCharacter (ridiculousfish/regress#82)
• Conditionally parse named capture groups (ridiculousfish/regress#83)
• Fix invalid quantifier loop (ridiculousfish/regress#84)
• Implement unicode flag dependent case folding (ridiculousfish/regress#81)
• Fix parsing for invalid control characters in class atoms (ridiculousfish/regress#85)
• Allow quantifiable assertions in non unicode mode (ridiculousfish/regress#86)
• Fix remaining unicode script property tests (ridiculousfish/regress#87)

Full Changelog: https://github.com/ridiculousfish/regress/compare/v0.7.0...v0.8.0

Commits

• 2ab0dfb Prepare the v0.8.0 release (#89)
• 4d5b706 Fix remaining unicode script property tests (#87)
• f3127f9 Allow quantifiable assertions in non unicode mode (#86)
• c95a802 Simplify the logic of parsing bracket class atoms (#88)
• 61d52fd Fix parsing for invalid control characters in class atoms (#85)
• da7c52c Implement unicode flag dependent case folding (#81)
• 1c51106 Refactor unicode generation to fully use ucd-parse (#77)
• fbf849c Fix invalid quantifier loop (#84)
• 649478b Conditionally parse named capture groups (#83)
• 77f02b3 Correctly reject characters in Atom PatternCharacter (#82)
• Additional commits viewable in compare view

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