Changelog: use link lists

This helps to:
1. Keep the changelog readable when editing the markdown and
2. Removes the need to duplicate the links to contributors all over the place.

Author: jrfnl

CHANGELOG.md

@@ -7,44 +7,65 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ## [Unreleased]
 
 ### Internal
-- Travis: add build against PHP 8.0 [#12](https://github.com/php-parallel-lint/PHP-Console-Color/pull/12) from [@jrfnl](https://github.com/jrfnl).
-- PHPCS: various improvements [#13](https://github.com/php-parallel-lint/PHP-Console-Color/pull/13) from [@jrfnl](https://github.com/jrfnl).
-- PHPUnit: improve configuration [#14](https://github.com/php-parallel-lint/PHP-Console-Color/pull/14) from [@jrfnl](https://github.com/jrfnl).
-- PHPUnit: use annotations for fixtures / cross-version compat up to PHPUnit 9.x [#16](https://github.com/php-parallel-lint/PHP-Console-Color/pull/16) from [@jrfnl](https://github.com/jrfnl).
-- CI: switch to GH Actions [#17](https://github.com/php-parallel-lint/PHP-Console-Color/pull/17) from [@jrfnl](https://github.com/jrfnl).
-- GH Actions: set error reporting to E_ALL [#18](https://github.com/php-parallel-lint/PHP-Console-Color/pull/18) from [@jrfnl](https://github.com/jrfnl).
+- Travis: add build against PHP 8.0 [#12] from [@jrfnl].
+- PHPCS: various improvements [#13] from [@jrfnl].
+- PHPUnit: improve configuration [#14] from [@jrfnl].
+- PHPUnit: use annotations for fixtures / cross-version compat up to PHPUnit 9.x [#16] from [@jrfnl].
+- CI: switch to GH Actions [#17] from [@jrfnl].
+- GH Actions: set error reporting to E_ALL [#18] from [@jrfnl].
+
+[#12]: https://github.com/php-parallel-lint/PHP-Console-Color/pull/12
+[#13]: https://github.com/php-parallel-lint/PHP-Console-Color/pull/13
+[#14]: https://github.com/php-parallel-lint/PHP-Console-Color/pull/14
+[#16]: https://github.com/php-parallel-lint/PHP-Console-Color/pull/16
+[#17]: https://github.com/php-parallel-lint/PHP-Console-Color/pull/17
+[#18]: https://github.com/php-parallel-lint/PHP-Console-Color/pull/18
+
 
 ## [1.0] - 2020-10-31
 
 ### Changed
 
-- BC-Break: The top-level namespace for all classes has changed from `JakubOnderka` to `PHP_Parallel_Lint`. [#10](https://github.com/php-parallel-lint/PHP-Console-Color/pull/10) from [@grogy](https://github.com/grogy).
+- BC-Break: The top-level namespace for all classes has changed from `JakubOnderka` to `PHP_Parallel_Lint`. [#10] from [@grogy].
 
 ### Added
 
-- Added downloading per month badge from [@grogy](https://github.com/grogy).
-- Added license badge from [@grogy](https://github.com/grogy).
-- Added instruction for installation from [@grogy](https://github.com/grogy).
-- Composer: add description [#11](https://github.com/php-parallel-lint/PHP-Console-Color/pull/11) from [@jrfnl](https://github.com/jrfnl).
+- Added downloading per month badge from [@grogy].
+- Added license badge from [@grogy].
+- Added instruction for installation from [@grogy].
+- Composer: add description [#11] from [@jrfnl].
 
 ### Internal
 
-- Updated PHP Parallel Lint dependency version restraint [#8](https://github.com/php-parallel-lint/PHP-Console-Color/pull/8) from [@jrfnl](https://github.com/jrfnl).
-- Travis: changed from "trusty" to "xenial" [#7](https://github.com/php-parallel-lint/PHP-Console-Color/pull/7) from [@jrfnl](https://github.com/jrfnl).
-- Update the unit tests setup [#9](https://github.com/php-parallel-lint/PHP-Console-Color/pull/9) from [@jrfnl](https://github.com/jrfnl).
+- Updated PHP Parallel Lint dependency version restraint [#8] from [@jrfnl].
+- Travis: changed from "trusty" to "xenial" [#7] from [@jrfnl].
+- Update the unit tests setup [#9] from [@jrfnl].
+
+[#7]: https://github.com/php-parallel-lint/PHP-Console-Color/pull/7
+[#8]: https://github.com/php-parallel-lint/PHP-Console-Color/pull/8
+[#9]: https://github.com/php-parallel-lint/PHP-Console-Color/pull/9
+[#10]: https://github.com/php-parallel-lint/PHP-Console-Color/pull/10
+[#11]: https://github.com/php-parallel-lint/PHP-Console-Color/pull/11
+
 
 ## [0.3] - 2020-05-14
 
 ### Added
 
-- Added changelog from [@reedy](https://github.com/reedy).
+- Added changelog from [@reedy].
 
 ### Internal
 
-- Travis: test against PHP 7.3 from [@samnela](https://github.com/samnela).
-- Cleaned readme - new organization from previous package from [@grogy](https://github.com/grogy).
-- Composer: updated dependancies to use new php-parallel-lint organisation from [@grogy](https://github.com/grogy).
-- Composer: marked package as replacing jakub-onderka/php-console-color from [@jrfnl](https://github.com/jrfnl).
-- Added a .gitattributes file from [@reedy](https://github.com/reedy).
-- Travis: test against PHP 7.4 and nightly from [@jrfnl](https://github.com/jrfnl).
-- Travis: only run PHPCS on PHP 7.4 from [@jrfnl](https://github.com/jrfnl).
+- Travis: test against PHP 7.3 from [@samnela].
+- Cleaned readme - new organization from previous package from [@grogy].
+- Composer: updated dependancies to use new php-parallel-lint organisation from [@grogy].
+- Composer: marked package as replacing jakub-onderka/php-console-color from [@jrfnl].
+- Added a .gitattributes file from [@reedy].
+- Travis: test against PHP 7.4 and nightly from [@jrfnl].
+- Travis: only run PHPCS on PHP 7.4 from [@jrfnl].
+
+
+[@grogy]: https://github.com/grogy
+[@jrfnl]: https://github.com/jrfnl
+[@reedy]: https://github.com/reedy
+[@samnela]: https://github.com/samnela