build(deps): bump github.com/ldez/exptostd from 0.3.1 to 0.4.0

Bumps [github.com/ldez/exptostd](https://github.com/ldez/exptostd) from 0.3.1 to 0.4.0.
- [Commits](ldez/exptostd@v0.3.1...v0.4.0)

---
updated-dependencies:
- dependency-name: github.com/ldez/exptostd
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Diff for: go.mod

@@ -65,7 +65,7 @@ require (
 	github.com/kunwardeep/paralleltest v1.0.10
 	github.com/kyoh86/exportloopref v0.1.11
 	github.com/lasiar/canonicalheader v1.1.2
-	github.com/ldez/exptostd v0.3.1
+	github.com/ldez/exptostd v0.4.0
 	github.com/ldez/gomoddirectives v0.6.1
 	github.com/ldez/grignotin v0.9.0
 	github.com/ldez/tagliatelle v0.7.1