Bump acorn from 8.0.5 to 8.7.1

Created by: dependabot[bot]

Bumps acorn from 8.0.5 to 8.7.1.

Commits

• 04bdf9a Mark version 8.7.1
• b4b3122 Adding a missing .js extension
• 5cc8280 Exclude RegExp v flag from test262
• 989e357 Bump test262 to latest commit
• c973f17 Bump github actions
• 4236464 remove redundant codePointToString
• 1ecd60b Update README.md
• 4e623e7 Update README.md
• 27c85bb Add Ukrainian badge
• c081b30 Add missing tokTypes to type definitions
• Additional commits viewable in compare view

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