Add Nothing (#33)

Author: Dean Karn

CHANGELOG.md

@@ -6,6 +6,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [5.18.0] - 2023-05-21
+### Added
+- typesext.Nothing & valuesext.Nothing for better clarity in generic params and values that represent struct{}. This will provide better code readability and intent.
+
 ## [5.17.2] - 2023-05-09
 ### Fixed
 - Prematurely closing http.Response Body before error with it can be intercepted for ErrUnexpectedResponse. 
@@ -46,7 +50,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Added `timext.NanoTime` for fast low level monotonic time with nanosecond precision.
 
-[Unreleased]: https://github.com/go-playground/pkg/compare/v5.17.2...HEAD
+[Unreleased]: https://github.com/go-playground/pkg/compare/v5.18.0...HEAD
+[5.18.0]: https://github.com/go-playground/pkg/compare/v5.17.2..v5.18.0
 [5.17.2]: https://github.com/go-playground/pkg/compare/v5.17.1..v5.17.2
 [5.17.1]: https://github.com/go-playground/pkg/compare/v5.17.0...v5.17.1
 [5.17.0]: https://github.com/go-playground/pkg/compare/v5.16.0...v5.17.0

README.md

@@ -1,6 +1,6 @@
 # pkg
 
-![Project status](https://img.shields.io/badge/version-5.17.2-green.svg)
+![Project status](https://img.shields.io/badge/version-5.18.0-green.svg)
 [![Lint & Test](https://github.com/go-playground/pkg/actions/workflows/go.yml/badge.svg)](https://github.com/go-playground/pkg/actions/workflows/go.yml)
 [![Coverage Status](https://coveralls.io/repos/github/go-playground/pkg/badge.svg?branch=master)](https://coveralls.io/github/go-playground/pkg?branch=master)
 [![GoDoc](https://godoc.org/github.com/go-playground/pkg?status.svg)](https://pkg.go.dev/mod/github.com/go-playground/pkg/v5)

types/types.go

@@ -0,0 +1,4 @@
+package typesext
+
+// Nothing indicates the absence of a value and is an alias to struct{}
+type Nothing = struct{}

values/values.go

@@ -0,0 +1,6 @@
+package valuesext
+
+import typesext "github.com/go-playground/pkg/v5/types"
+
+// Nothing is an instantiated value of type typesext.Nothing.
+var Nothing = typesext.Nothing{}