deps: bump github.com/mattn/go-isatty from 0.0.20 to 0.0.21 in the go-dependencies group

[dependabot]

Bumps the go-dependencies group with 1 update: github.com/mattn/go-isatty.

Updates github.com/mattn/go-isatty from 0.0.20 to 0.0.21

Commits

• 4237fb1 Update Go test matrix to current versions (1.24-1.26)
• 433c12b Update GitHub Actions to latest versions
• 1cf5589 Add wasip1 and wasip2 to build constraints in isatty_others.go
• 1237245 Update dependencies: go 1.15 -> 1.21, golang.org/x/sys v0.6.0 -> v0.28.0
• ac9c88d Fix typo in comment: undocomented -> undocumented
• 8b7124e Add availability check for NtQueryObject in init
• 08d0313 Fix isCygwinPipeName to reject names with extra trailing tokens
• See full diff in compare view

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Summary by cubic

Upgrade github.com/mattn/go-isatty to v0.0.21 to pull in bug fixes and broader platform support. Improves TTY detection on Windows and adds WASI build tags; no app code changes.

• Dependencies
  • Bumped github.com/mattn/go-isatty 0.0.20 → 0.0.21.
  • Includes Windows fixes (pipe name parsing, NtQueryObject availability check).
  • Adds wasip1/wasip2 build constraints and updates internal golang.org/x/sys.

^{Written for commit 47dcd4a. Summary will update on new commits.}

[cubic-dev-ai]

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