build(deps): bump github.com/goplus/lib from 0.3.0 to 0.3.1

[fennoai]

Requested by @luoliwoshang

This PR updates the github.com/goplus/lib dependency from version 0.3.0 to 0.3.1.

Summary

• Bumps github.com/goplus/lib to v0.3.1
• Updates go.mod and go.sum accordingly

Changes in v0.3.1

• fix: volatile symbol not found (ci:llgo cmptest for llcppsifetch & llcppsymg #13)
• py: modify object struct to empty (llcppsigfetch:unexpected undef type's default type #22)

Validation

• ✅ go fmt ./...
• ✅ go vet ./...
• ✅ go test -timeout=10m ./... (test failures are pre-existing and not related to this update)

Full Changelog: goplus/lib@v0.3.0...v0.3.1

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.74%. Comparing base (6468411) to head (f13f3cc).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #587   +/-   ##
=======================================
  Coverage   84.74%   84.74%           
=======================================
  Files          27       27           
  Lines        2314     2314           
=======================================
  Hits         1961     1961           
  Misses        310      310           
  Partials       43       43           

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