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

[dependabot]

Bumps the go-modules group with 1 update: github.com/mattn/go-runewidth.

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

Commits

• b7b94fb Merge pull request #91 from mattn/add-is-combining-width
• 2c33cbf Update CI: bump actions and Go versions
• c6c0a14 Add IsCombiningWidth function
• 6399b33 Merge pull request #90 from bugwhisperer418/76-zero-width-variation-selections
• dadc062 fix benchmark test checksums
• 75db52f update test checksums
• fb9c1d1 Treat Mn variation selections with EA width "A" as combining with 0 width
• See full diff in compare view

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[greptile-apps]

Greptile Summary

This PR is an automated Dependabot bump of github.com/mattn/go-runewidth from v0.0.20 to v0.0.21. The only changes are the version string in go.mod and the corresponding checksum entries in go.sum.

Key points:

• The new release adds an IsCombiningWidth helper function and fixes zero-width variation selections (Mn characters with EA width "A" are now treated as combining with 0 width), which can affect text-width calculations in terminal UIs.
• The go.mod hash in go.sum is shared between v0.0.20 and v0.0.21 (XBkDxAl56ILZc9knddidhrOlY5R/pDhgLpndooCuJAs=), which is expected when the upstream module's own go.mod file was not modified between releases.
• No application code was changed; this is a pure dependency update.

Confidence Score: 5/5

• This PR is safe to merge — it is a routine patch-level dependency bump with no breaking API changes.
• The change is limited to two auto-generated files (go.mod and go.sum). The upstream release is a minor additive update (new helper function + a narrow unicode width fix) with a high Dependabot compatibility score. No application logic is touched.
• No files require special attention

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Dependabot detects go-runewidth v0.0.21] --> B[Update go.mod\nv0.0.20 → v0.0.21]
    B --> C[Regenerate go.sum\nNew h1 hash for v0.0.21]
    C --> D{CI passes?}
    D -- Yes --> E[Merge PR]
    D -- No --> F[Investigate failure]

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_{Last reviewed commit: 5fe0f8d}

[dependabot]

Looks like github.com/mattn/go-runewidth is updatable in another way, so this is no longer needed.