Do not export non-essential files and prepare release

.gitattributes

+/.gitattributes export-ignore
+/.gitignore     export-ignore
+/.php_cs        export-ignore
+/.travis.yml    export-ignore
+/build.xml      export-ignore
+/phpunit.xml    export-ignore
+/tests          export-ignore
+
+*.php diff=php

ChangeLog.md

@@ -2,6 +2,10 @@
 
 All notable changes to `sebastianbergmann/code-unit-reverse-lookup` are documented in this file using the [Keep a CHANGELOG](http://keepachangelog.com/) principles.
 
+## [1.0.3] - 2024-03-01
+
+* No code changes, only updated `.gitattributes` to not export non-essential files.
+
 ## [1.0.2] - 2020-11-30
 
 ### Changed
@@ -12,4 +16,5 @@ All notable changes to `sebastianbergmann/code-unit-reverse-lookup` are document
 
 * Initial release
 
+[1.0.3]: https://github.com/sebastianbergmann/code-unit-reverse-lookup/compare/1.0.2...1.0.3
 [1.0.2]: https://github.com/sebastianbergmann/code-unit-reverse-lookup/compare/1.0.1...1.0.2