chore(deps): bump github.com/sanity-io/litter from 1.3.0 to 1.5.1

Bumps [github.com/sanity-io/litter](https://github.com/sanity-io/litter) from 1.3.0 to 1.5.1.
- [Release notes](https://github.com/sanity-io/litter/releases)
- [Changelog](https://github.com/sanity-io/litter/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sanity-io/litter/compare/v1.3.0...v1.5.1)

go.mod

@@ -4,5 +4,5 @@ go 1.15
 
 require (
 	github.com/apex/log v1.9.0
-	github.com/sanity-io/litter v1.3.0
+	github.com/sanity-io/litter v1.5.1
 )