Update changelog

Author: jwodder

CHANGELOG.md

@@ -0,0 +1,7 @@
+v0.2.0 (in development)
+-----------------------
+- Update clap dependency to 4.0
+
+v0.1.0 (2022-07-08)
+-------------------
+Initial release

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ghrepo"
-version = "0.1.0"
+version = "0.2.0-dev"
 edition = "2021"
 rust-version = "1.60"
 description = "Parse & construct GitHub repository URLs & specifiers"

README.md

@@ -3,7 +3,7 @@
 [![codecov.io](https://codecov.io/gh/jwodder/ghrepo-rust/branch/master/graph/badge.svg)](https://codecov.io/gh/jwodder/ghrepo-rust)
 [![MIT License](https://img.shields.io/github/license/jwodder/ghrepo.svg)](https://opensource.org/licenses/MIT)
 
-[GitHub](https://github.com/jwodder/ghrepo-rust) | [crates.io](https://crates.io/crates/ghrepo) | [Documentation](https://docs.rs/ghrepo) | [Issues](https://github.com/jwodder/ghrepo-rust/issues)
+[GitHub](https://github.com/jwodder/ghrepo-rust) | [crates.io](https://crates.io/crates/ghrepo) | [Documentation](https://docs.rs/ghrepo) | [Issues](https://github.com/jwodder/ghrepo-rust/issues) | [Changelog](https://github.com/jwodder/ghrepo-rust/blob/master/CHANGELOG.md)
 
 `ghrepo` extracts a GitHub repository's owner & name from various GitHub URL
 formats (or just from a string of the form `OWNER/REPONAME` or `REPONAME`), and